expansionn.

/ɛkˈspanʃən/

Etymology: < late Latin expansiōn-em, noun of action < expandĕre to expand v.

The action of expanding, the fact or state of being expanded.

a. The action or process of spreading out or unfolding; the state of being spread out or unfolded; the opening of a bud, flower, etc. Also, †a spreading out to view, a display.

ΘΚΠ

the world > space > extension in space > [noun] > spreading out

spreadinga1250

spreadinga1382

outspreading?c1425

stenting1507

expansure1598

extensure1604

expansion1646

dispansion1658

extension1684

expanding1844

outspread1848

splaying1881

fanning-out1883

1646 Sir T. Browne Pseudodoxia Epidemica iv. v. 191 The..distance betwixt the extremity of the fingers of either hand upon expansion .

1656 tr. T. Hobbes Elements Philos. iv. xxvii. 340 Whereupon there will follow a great expansion of Light, with vehement flame.

1664 H. Power Exper. Philos. ii. 101 The Spring of a Watch..if the String be broke..flyes out into its fullest expansion.

1701 N. Grew Cosmol. Sacra i. v. §20 The easie expansion of the Wing of a Bird.

1731 A. Pope Epist. to Earl of Burlington 12 The gilded Clouds in fair expansion lie.

1847 T. De Quincey Spanish Mil. Nun (1853) 18 A mob orator, whose brawling mouth open to its widest expansion, [etc.].

1867 J. Ingelow Laurance She..knew.. The pleasure of the leaf in exquisite Expansion.

b. The detailed expression of what is implicitly contained in a statement; the writing out in full the meaning of graphical contractions. Also in Algebra the process of working out a contracted expression (cf. expand v. 1b) and stating the result in full; the result or statement thus obtained.

ΘΚΠ

society > communication > writing > manner of writing > [noun] > detailed expression of implied meaning

expansion1858

1858 I. Todhunter Algebra for Schools xxxvi. §519 The subject of the expansion of expressions is..properly a portion of the Differential Calculus.

1858 I. Todhunter Algebra for Schools xxxvi. §524 To find the number of terms in the expansion of any multinomial.

1886 J. Edwards Differential Calculus 96 Now assuming the possiblility of such an expansion, let, etc.

c. Naval Architecture. The mathematical enlargement of a ship's lines from a drawing or model to the full size of building. Also attributive.

ΚΠ

1869 E. J. Reed Shipbuilding 186 Either a model of one side of the ship or an expansion drawing is prepared, on which to set off the edges and butts of the plates.

1869 E. J. Reed Shipbuilding 439 An expansion batten is applied to the line on the floor representing the moulding edge of the frame.

1877 S. J. P. Thearle Theoret. Naval Archit. I. 163 When an expansion drawing is made, the several strakes of plating can be shown upon it, also their thicknesses... It is obviously impossible to calculate the position of the centre of gravity from an expansion.

2. concrete. Anything that is spread out; an expanse; esp. the expanse of heaven, the firmament.

ΘΚΠ

the world > the universe > sky, heavens > [noun]

roofeOE

welkinc825

heaveneOE

heightOE

heavenOE

liftOE

loftOE

welkin1122

skies?a1289

firmamentc1290

skewa1300

spherea1300

skewsc1320

hemispherec1374

cope of heavenc1380

clouda1400

skya1425

elementc1485

axle-treea1522

scrowc1540

pole1572

horizona1577

vaulta1586

round?1593

the cope1596

pend1599

floor1600

canopy1604

cope1609

expansion1611

concameration1625

convex1627

concave1635

expansum1635

blue1647

the expanse1667

blue blanket1726

empyrean1727

carry1788

span1803

overhead1865

the world > space > extension in space > [noun] > spreading out > an expanse of something

spacea1382

widenessa1382

continuance1398

field1547

sheet1593

universe1598

main1609

reach1610

expansion1611

extent1627

champaign1656

fetch1662

mass1662

expanse1667

spread1712

run1719

width1733

acre1759

sweep1767

contiguity1785

extension1786

stretch1829

breadths1839

outspread1847

outstretch1858

1611 Bible (King James) Gen. i. 6 Let there be a firmament [margin. expansion] in the midst of the waters.

1659 J. Pearson Expos. Creed (1839) 70 This house of God..is not all of the same materials..there is a vast difference between the heavenly expansions.

1760 J. Beattie tr. Lucretius in Orig. Poems & Transl. 77 All that lies Beneath the starr'd expansion of the skies.

1823 C. Lamb On Some of Old Actors (new ed.) in Elia 312 Less time..than it took to cover the expansion of his broad moony face..with expression.

1840 T. Hood Miss Kilmansegg ii, in New Monthly Mag. 60 258 Venus and Mars Are rolling along in their golden cars Through the sky's serene expansion.

1862 D. T. Ansted & R. G. Latham Channel Islands i. iv. 64 Some..flat expansions of hard..rock, afford a kind of irregular pavement.

figurative.1662 R. Mathews Unlearned Alchymist (new ed.) §57. 61 That ocean or expansion of wrath.

†3.

a. Extent; space to which anything is extended.

ΘΚΠ

the world > space > extension in space > [noun]

space1521

excourse?c1550

extendure1610

extendedness1674

expansion1690

extension1790

development1807

extensitya1834

1690 J. Locke Ess. Humane Understanding ii. vii. 54 The capacious Mind of Man..extends its thoughts often even beyond the utmost expansion of Matter.

1712 R. Blackmore Creation iv. 181 Lost in Expansion void and infinite.

1755 in S. Johnson Dict. Eng. Lang.

b. Pure space (see quot. from Locke).

ΚΠ

1690 J. Locke Ess. Humane Understanding ii. xv. 93 Distance or Space, in its simple abstract conception..I call Expansion, to distinguish it from Extension, which by some is used to express this distance only as it is in the solid parts of Matter.

a. The action or process of causing something to occupy or contain a larger space, or of acquiring greater volume or capacity; dilatation; an instance of this.

ΘΚΠ

the world > space > extension in space > expansion or enlargement > [noun]

waxingc1055

increasec1374

dilatationc1400

larging?a1425

magnification?a1425

bredingc1440

ampliation1509

enlarginga1513

dilating1532

ampliating1541

amplification1546

amplifying1553

propagation1563

enlargement1564

widening1569

growth1587

dilation1598

expatiation1612

diduction1634

expansion1635

extendinga1649

dispansion1658

elargement1680

expatiating1708

explicating1730

aggrandizement1772

extension1839

expanse1860

aggrandization1929

1665 Philos. Trans. (Royal Soc.) 1 29 To prove the expansion of glass by heat.

1665 Philos. Trans. (Royal Soc.) 1 49 What Bodies are expanded by being frozen, and how that expansion is evinced.

1693 R. Bentley Boyle Lect. viii. 27 The Condensation and Expansion of any portion of the Air, is always proportional to the weight and pressure incumbent upon it.

1782 Watt Specif. Patent 1321 5 The piston continues to descend by virtue of the expansion of the steam.

1830 R. Knox tr. P. A. Béclard Elements Gen. Anat. 235 They are furnished with tensor muscles, whether proper, or simply by expansion of their tendons.

1875 R. Hunt & F. W. Rudler Ure's Dict. Arts (ed. 7) II. 319 Some remarkable examples of expansion are furnished by the influence of sunshine on the Britannia Tubular Bridge.

1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 874 These movements depend not upon alternate expansion and contraction of the tissue..but, etc.

figurative.1635 W. Habington Castara (ed. 2) ii. 155 My heart Expanssion wants, to thinke what now thou art.

b. of immaterial things.

ΚΠ

a1682 Sir T. Browne Christian Morals (1716) i. 19 Spread not into boundless Expansions either of designs or desires.

1856 B. Brodie Psychol. Inq. (ed. 3) I. i. 31 A high education..may..have the effect of preventing the full expansion of genius.

1864 D. G. Mitchell Seven Stories 69 I felt..an unusual expansion.

1879 M. Arnold Mixed Ess. Pref. 7 The love of liberty is simply the instinct in man for expansion.

c. Commerce and Finance. (a) An extension (of business transactions). (b) An increase in the amount of the circulating medium. More fully expansion of the currency.

ΚΠ

1847 J. Craig New Universal Dict. Expansion, in commerce, an increase of issues of bank notes.

1864 in Webster's Amer. Dict. Eng. Lang.

1891 Pall Mall Gaz. 10 Nov. 7/1 In some directions there has been expansion, so that the losses have been partially neutralized.

d. Extension of the territorial rule or sway of a country.

ΚΠ

1882 J. R. Seeley in Macmillan's Mag. 46 456 (title) The Expansion of England in the Eighteenth Century.

1903 Sun (N.Y.) 1 Dec. 2 When he indorsed the doctrine of expansion the cheers were pronounced.

5. The amount or degree of dilatation.

ΚΠ

1790 Blagden in Philos. Trans. (Royal Soc.) 80 322 The whole expansion of pure spirit from 30° to 100° of Fahrenheit's thermometer, is not less than ¹/ ₂₅th of its whole bulk at 30°.

1815 J. Smith Panorama Sci. & Art II. 32 Taking a proportional part of the difference of the two expansions.

1875 R. Hunt & F. W. Rudler Ure's Dict. Arts (ed. 7) II. 391 The expansion of the solid corresponding to two degrees of the thermometer, is twice the expansion which corresponds to one degree.

6. concrete.

a. An expanded or dilated portion.

ΘΚΠ

the world > space > extension in space > expansion or enlargement > [noun] > an expanded thing or part

ampliation1590

enlargementa1691

expansion1860

1860 J. Tyndall Glaciers of Alps ii. vii. 261 This lake [Geneva] is simply an expansion of the river Rhone.

1866 T. H. Huxley Lessons Elem. Physiol. (1869) ix. 239 The structure..of the sensory expansion in which the optic nerve terminates.

1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 544 The membranous expansions or appendages.

b. A product of expansion; what (a thing) is expanded into.

ΚΠ

1865 J. Ruskin Sesame & Lilies ii. 178 A man has a personal work..and a public work..which is the expansion of the other.

7. Steam-engine. The increase in bulk of the steam which takes place in a partially filled cylinder after communication with the boiler is cut off.The improvement introduced by Watt's patent of 1782 consisted in the economizing of steam by allowing the piston to be propelled, during the latter portion of its excursion, by the ‘expansion’ of the steam first introduced. An engine in which this is done is said to work ‘by expansion’. A double (or triple) expansion engine is one in which the steam passes from one cylinder into another, so that the expansive force is used twice (or thrice).

ΘΚΠ

society > occupation and work > equipment > machine > machines which impart power > engine > steam engine > [noun] > steam > increase in

expansion1782

1782 [see sense 4a].

1819 A. Rees Cycl. XXXIV. at Steam-Engine Mr. Watt's principle of expansion.

1874 E. H. Knight Pract. Dict. Mech. I. 817/1 An automatic expansion is one which is regulated by the governor, and varies with the amount of power required.

1875 R. F. Martin tr. J. Havrez On Recent Improvem. Winding Machinery 80 The engineman must be able to work his engine with a variable expansion with as great ease as an ordinary high-pressure engine.

1875 R. F. Martin tr. J. Havrez On Recent Improvem. Winding Machinery 80 MM. Scohy and Crespin..took out a patent for applying a system of expansion to winding engines.

Compounds

C1. General attributive.

expansion theory n.

ΚΠ

1886 F. B. Jevons in Jrnl. Hellenic Stud. 7 292 Every form of the expansion theory [i.e. the theory that the Iliad is an ‘expansion’ of a smaller poem].

C2.

expansion apparatus n. = cloud chamber n. at cloud n. Compounds 2; see also quot. 1968 for expansion chamber n.

ΚΠ

1897 C. T. R. Wilson in Philos. Trans. (Royal Soc.) A. 189 267 (heading) Conditions to be satisfied by the expansion apparatus.

expansion board n. Computing a circuit board that may be connected to or inserted in a computer in order to provide extra facilities or memory.

ΘΚΠ

society > computing and information technology > hardware > [noun] > electronic component, circuitry > expansion board

memory board1955

sound card1971

expansion board1978

accelerator board1981

accelerator card1982

expansion card1982

1978 Pract. Computing July–Aug. 4 The chassis houses the computer, power supply, fans, and has three additional slots for expansion boards.

1985 Acorn User Feb. 11/4 Watford Electronics' 32k RAM expansion board gives your Beeb 27k of program space plus 20k for graphics.

expansion box n. a chamber fitted to a pipe to allow for the expansion of the liquid, gas, etc., which flows through the pipe.

ΚΠ

1838 Civil Engineer & Architect's Jrnl. 1 237/2 As the water warms, it rises through the pipe into the expansion box... To guard against the danger of exceeding the proper degree of heat, the expansion box is furnished with a pipe.

1939 Jrnl. Royal Aeronaut. Soc. 43 748 The exhaust gases from a group of cylinders are discharged through a number of expansion boxes, the expansion boxes being shaped as a flattened streamline member lying in the airstream.

expansion card n. Computing = expansion board n. above.

ΘΚΠ

society > computing and information technology > hardware > [noun] > electronic component, circuitry > expansion board

memory board1955

sound card1971

expansion board1978

accelerator board1981

accelerator card1982

expansion card1982

1982 Pract. Computing Nov. 66 Very reasonably priced for those who already have an Apple II and expansion card.

1986 Managem. Accounting Aug. 56 If all the sockets on the Mother Board are filled..you will have to install an ‘expansion card’ to increase its memory.

expansion chamber n. see expansion apparatus n.

ΚΠ

1933 Discovery Apr. 107/2 This recoiling nucleus..is an efficient ionizer and so can be detected either by its electrical effect or its track can be photographed in an expansion chamber.

1968 Practical Motorist Nov. 333/1 Expansion tank (chamber), a small tank connected to the overflow of the radiator on some modern cars which collects water and steam forced through the overflow pipe. The water is drawn back into the main system when the engine cools.

expansion-coupling n. (see quots.).

ΚΠ

1874 E. H. Knight Pract. Dict. Mech. I. 816/2 Expansion-coupling. The coupling represented consists of an expansion-drum of thin copper x between the extremities of two pipes a i, Fig. 1901, which, in elongating, press the sides of the drum in, and draw them out in cooling.

expansion-curb n. (see quots.).

ΚΠ

1847 J. Craig New Universal Dict. Expansion curb, in Horology, a contrivance for counteracting expansion or contraction.

expansion-drum n. (see quots.).

ΚΠ

1874 E. H. Knight Pract. Dict. Mech. I. 816/2 Expansion-drum, an arrangement by which an occasional change of speed may be effected.

expansion-engine n. (see 7).

ΚΠ

1847 J. Craig New Universal Dict. Expansion engine.

1886 Pall Mall Gaz. 21 Sept. 13/2 These steamers..are provided with triple expansion engines.

expansion-gear n. an apparatus for cutting off steam from the cylinder at a given point of the stroke.

ΚΠ

1850 Pract. Mech. Jrnl. 3 28 (heading) Whitelaw's steam-engine expansion gear.

1875 R. F. Martin tr. J. Havrez On Recent Improvem. Winding Machinery 80 MM. Scohy and Crespin add to the regular form of cylinder the expansion gear of M. Meyer.

expansion-joint n. (see quots.).

ΚΠ

1849 J. Weale Rudim. Dict. Terms Archit. ii. 179/1 Expansion-joint, a stuffing-box joint connecting the steam pipes, so as to allow one of them to slide within the enlarged end of the other when the length increases by expansion.

1864 Webster's Amer. Dict. Eng. Lang. Expansion-joint, an attachment of the framing to the boiler, which allows the boiler to expand without bending the framing.

1882 Worcs. Exhib. Catal. iii. 5 Samples of improved expansion joints.

expansion-slide n. a slide belonging to the expansion-valve n.

ΚΠ

1848 W. Pole tr. E. Alban High-pressure Steam Engine 261 The expansion slide is made to act through the motion of the principal slide below.

expansion-valve n. a valve which shuts off the steam in its passage to the cylinder.

ΚΠ

1849 Fairbairn in Mechanics' Mag. 51 255 A new construction of expansion valves for condensing steam engines.

Draft additions 1993

expansion slot n. Computing a socket in a piece of computing equipment to which an expansion board may be connected.

ΘΚΠ

society > computing and information technology > hardware > [noun] > electronic component, circuitry > expansion slot

slot1978

expansion slot1980

1980 Practical Computing Aug. 82 (caption) The basic Tuscan board featuring the Z-80 CPU, 8k RAM, 8k ROM, on-board video and 1/0 section with five spare S-100 expansion slots.

1990 Which? Nov. 651/1 Many have expansion slots so that you can add extra memory, for example, but these are specific to each manufacturer, and your choice is limited.

This entry has not yet been fully updated (first published 1894; most recently modified version published online March 2022).

单词	expansion
释义	expansionn. /ɛkˈspanʃən/ Etymology: < late Latin expansiōn-em, noun of action < expandĕre to expand v. The action of expanding, the fact or state of being expanded. 1. a. The action or process of spreading out or unfolding; the state of being spread out or unfolded; the opening of a bud, flower, etc. Also, †a spreading out to view, a display. ΘΚΠ the world > space > extension in space > [noun] > spreading out spreadinga1250 spreadinga1382 outspreading?c1425 stenting1507 expansure1598 extensure1604 expansion1646 dispansion1658 extension1684 expanding1844 outspread1848 splaying1881 fanning-out1883 1646 Sir T. Browne Pseudodoxia Epidemica iv. v. 191 The..distance betwixt the extremity of the fingers of either hand upon expansion . View more context for this quotation 1656 tr. T. Hobbes Elements Philos. iv. xxvii. 340 Whereupon there will follow a great expansion of Light, with vehement flame. 1664 H. Power Exper. Philos. ii. 101 The Spring of a Watch..if the String be broke..flyes out into its fullest expansion. 1701 N. Grew Cosmol. Sacra i. v. §20 The easie expansion of the Wing of a Bird. 1731 A. Pope Epist. to Earl of Burlington 12 The gilded Clouds in fair expansion lie. 1847 T. De Quincey Spanish Mil. Nun (1853) 18 A mob orator, whose brawling mouth open to its widest expansion, [etc.]. 1867 J. Ingelow Laurance She..knew.. The pleasure of the leaf in exquisite Expansion. b. The detailed expression of what is implicitly contained in a statement; the writing out in full the meaning of graphical contractions. Also in Algebra the process of working out a contracted expression (cf. expand v. 1b) and stating the result in full; the result or statement thus obtained. ΘΚΠ society > communication > writing > manner of writing > [noun] > detailed expression of implied meaning expansion1858 1858 I. Todhunter Algebra for Schools xxxvi. §519 The subject of the expansion of expressions is..properly a portion of the Differential Calculus. 1858 I. Todhunter Algebra for Schools xxxvi. §524 To find the number of terms in the expansion of any multinomial. 1886 J. Edwards Differential Calculus 96 Now assuming the possiblility of such an expansion, let, etc. c. Naval Architecture. The mathematical enlargement of a ship's lines from a drawing or model to the full size of building. Also attributive. ΚΠ 1869 E. J. Reed Shipbuilding 186 Either a model of one side of the ship or an expansion drawing is prepared, on which to set off the edges and butts of the plates. 1869 E. J. Reed Shipbuilding 439 An expansion batten is applied to the line on the floor representing the moulding edge of the frame. 1877 S. J. P. Thearle Theoret. Naval Archit. I. 163 When an expansion drawing is made, the several strakes of plating can be shown upon it, also their thicknesses... It is obviously impossible to calculate the position of the centre of gravity from an expansion. 2. concrete. Anything that is spread out; an expanse; esp. the expanse of heaven, the firmament. ΘΚΠ the world > the universe > sky, heavens > [noun] roofeOE welkinc825 heaveneOE heightOE heavenOE liftOE loftOE welkin1122 skies?a1289 firmamentc1290 skewa1300 spherea1300 skewsc1320 hemispherec1374 cope of heavenc1380 clouda1400 skya1425 elementc1485 axle-treea1522 scrowc1540 pole1572 horizona1577 vaulta1586 round?1593 the cope1596 pend1599 floor1600 canopy1604 cope1609 expansion1611 concameration1625 convex1627 concave1635 expansum1635 blue1647 the expanse1667 blue blanket1726 empyrean1727 carry1788 span1803 overhead1865 the world > space > extension in space > [noun] > spreading out > an expanse of something spacea1382 widenessa1382 continuance1398 field1547 sheet1593 universe1598 main1609 reach1610 expansion1611 extent1627 champaign1656 fetch1662 mass1662 expanse1667 spread1712 run1719 width1733 acre1759 sweep1767 contiguity1785 extension1786 stretch1829 breadths1839 outspread1847 outstretch1858 1611 Bible (King James) Gen. i. 6 Let there be a firmament [margin. expansion] in the midst of the waters. View more context for this quotation 1659 J. Pearson Expos. Creed (1839) 70 This house of God..is not all of the same materials..there is a vast difference between the heavenly expansions. 1760 J. Beattie tr. Lucretius in Orig. Poems & Transl. 77 All that lies Beneath the starr'd expansion of the skies. 1823 C. Lamb On Some of Old Actors (new ed.) in Elia 312 Less time..than it took to cover the expansion of his broad moony face..with expression. 1840 T. Hood Miss Kilmansegg ii, in New Monthly Mag. 60 258 Venus and Mars Are rolling along in their golden cars Through the sky's serene expansion. 1862 D. T. Ansted & R. G. Latham Channel Islands i. iv. 64 Some..flat expansions of hard..rock, afford a kind of irregular pavement. figurative.1662 R. Mathews Unlearned Alchymist (new ed.) §57. 61 That ocean or expansion of wrath. †3. a. Extent; space to which anything is extended. ΘΚΠ the world > space > extension in space > [noun] space1521 excourse?c1550 extendure1610 extendedness1674 expansion1690 extension1790 development1807 extensitya1834 1690 J. Locke Ess. Humane Understanding ii. vii. 54 The capacious Mind of Man..extends its thoughts often even beyond the utmost expansion of Matter. 1712 R. Blackmore Creation iv. 181 Lost in Expansion void and infinite. 1755 in S. Johnson Dict. Eng. Lang. b. Pure space (see quot. from Locke). ΚΠ 1690 J. Locke Ess. Humane Understanding ii. xv. 93 Distance or Space, in its simple abstract conception..I call Expansion, to distinguish it from Extension, which by some is used to express this distance only as it is in the solid parts of Matter. 4. a. The action or process of causing something to occupy or contain a larger space, or of acquiring greater volume or capacity; dilatation; an instance of this. ΘΚΠ the world > space > extension in space > expansion or enlargement > [noun] waxingc1055 increasec1374 dilatationc1400 larging?a1425 magnification?a1425 bredingc1440 ampliation1509 enlarginga1513 dilating1532 ampliating1541 amplification1546 amplifying1553 propagation1563 enlargement1564 widening1569 growth1587 dilation1598 expatiation1612 diduction1634 expansion1635 extendinga1649 dispansion1658 elargement1680 expatiating1708 explicating1730 aggrandizement1772 extension1839 expanse1860 aggrandization1929 1665 Philos. Trans. (Royal Soc.) 1 29 To prove the expansion of glass by heat. 1665 Philos. Trans. (Royal Soc.) 1 49 What Bodies are expanded by being frozen, and how that expansion is evinced. 1693 R. Bentley Boyle Lect. viii. 27 The Condensation and Expansion of any portion of the Air, is always proportional to the weight and pressure incumbent upon it. 1782 Watt Specif. Patent 1321 5 The piston continues to descend by virtue of the expansion of the steam. 1830 R. Knox tr. P. A. Béclard Elements Gen. Anat. 235 They are furnished with tensor muscles, whether proper, or simply by expansion of their tendons. 1875 R. Hunt & F. W. Rudler Ure's Dict. Arts (ed. 7) II. 319 Some remarkable examples of expansion are furnished by the influence of sunshine on the Britannia Tubular Bridge. 1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 874 These movements depend not upon alternate expansion and contraction of the tissue..but, etc. figurative.1635 W. Habington Castara (ed. 2) ii. 155 My heart Expanssion wants, to thinke what now thou art. b. of immaterial things. ΚΠ a1682 Sir T. Browne Christian Morals (1716) i. 19 Spread not into boundless Expansions either of designs or desires. 1856 B. Brodie Psychol. Inq. (ed. 3) I. i. 31 A high education..may..have the effect of preventing the full expansion of genius. 1864 D. G. Mitchell Seven Stories 69 I felt..an unusual expansion. 1879 M. Arnold Mixed Ess. Pref. 7 The love of liberty is simply the instinct in man for expansion. c. Commerce and Finance. (a) An extension (of business transactions). (b) An increase in the amount of the circulating medium. More fully expansion of the currency. ΚΠ 1847 J. Craig New Universal Dict. Expansion, in commerce, an increase of issues of bank notes. 1864 in Webster's Amer. Dict. Eng. Lang. 1891 Pall Mall Gaz. 10 Nov. 7/1 In some directions there has been expansion, so that the losses have been partially neutralized. d. Extension of the territorial rule or sway of a country. ΚΠ 1882 J. R. Seeley in Macmillan's Mag. 46 456 (title) The Expansion of England in the Eighteenth Century. 1903 Sun (N.Y.) 1 Dec. 2 When he indorsed the doctrine of expansion the cheers were pronounced. 5. The amount or degree of dilatation. ΚΠ 1790 Blagden in Philos. Trans. (Royal Soc.) 80 322 The whole expansion of pure spirit from 30° to 100° of Fahrenheit's thermometer, is not less than ¹/ ₂₅th of its whole bulk at 30°. 1815 J. Smith Panorama Sci. & Art II. 32 Taking a proportional part of the difference of the two expansions. 1875 R. Hunt & F. W. Rudler Ure's Dict. Arts (ed. 7) II. 391 The expansion of the solid corresponding to two degrees of the thermometer, is twice the expansion which corresponds to one degree. 6. concrete. a. An expanded or dilated portion. ΘΚΠ the world > space > extension in space > expansion or enlargement > [noun] > an expanded thing or part ampliation1590 enlargementa1691 expansion1860 1860 J. Tyndall Glaciers of Alps ii. vii. 261 This lake [Geneva] is simply an expansion of the river Rhone. 1866 T. H. Huxley Lessons Elem. Physiol. (1869) ix. 239 The structure..of the sensory expansion in which the optic nerve terminates. 1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 544 The membranous expansions or appendages. b. A product of expansion; what (a thing) is expanded into. ΚΠ 1865 J. Ruskin Sesame & Lilies ii. 178 A man has a personal work..and a public work..which is the expansion of the other. 7. Steam-engine. The increase in bulk of the steam which takes place in a partially filled cylinder after communication with the boiler is cut off.The improvement introduced by Watt's patent of 1782 consisted in the economizing of steam by allowing the piston to be propelled, during the latter portion of its excursion, by the ‘expansion’ of the steam first introduced. An engine in which this is done is said to work ‘by expansion’. A double (or triple) expansion engine is one in which the steam passes from one cylinder into another, so that the expansive force is used twice (or thrice). ΘΚΠ society > occupation and work > equipment > machine > machines which impart power > engine > steam engine > [noun] > steam > increase in expansion1782 1782 [see sense 4a]. 1819 A. Rees Cycl. XXXIV. at Steam-Engine Mr. Watt's principle of expansion. 1874 E. H. Knight Pract. Dict. Mech. I. 817/1 An automatic expansion is one which is regulated by the governor, and varies with the amount of power required. 1875 R. F. Martin tr. J. Havrez On Recent Improvem. Winding Machinery 80 The engineman must be able to work his engine with a variable expansion with as great ease as an ordinary high-pressure engine. 1875 R. F. Martin tr. J. Havrez On Recent Improvem. Winding Machinery 80 MM. Scohy and Crespin..took out a patent for applying a system of expansion to winding engines. Compounds C1. General attributive. expansion theory n. ΚΠ 1886 F. B. Jevons in Jrnl. Hellenic Stud. 7 292 Every form of the expansion theory [i.e. the theory that the Iliad is an ‘expansion’ of a smaller poem]. C2. expansion apparatus n. = cloud chamber n. at cloud n. Compounds 2; see also quot. 1968 for expansion chamber n. ΚΠ 1897 C. T. R. Wilson in Philos. Trans. (Royal Soc.) A. 189 267 (heading) Conditions to be satisfied by the expansion apparatus. expansion board n. Computing a circuit board that may be connected to or inserted in a computer in order to provide extra facilities or memory. ΘΚΠ society > computing and information technology > hardware > [noun] > electronic component, circuitry > expansion board memory board1955 sound card1971 expansion board1978 accelerator board1981 accelerator card1982 expansion card1982 1978 Pract. Computing July–Aug. 4 The chassis houses the computer, power supply, fans, and has three additional slots for expansion boards. 1985 Acorn User Feb. 11/4 Watford Electronics' 32k RAM expansion board gives your Beeb 27k of program space plus 20k for graphics. expansion box n. a chamber fitted to a pipe to allow for the expansion of the liquid, gas, etc., which flows through the pipe. ΚΠ 1838 Civil Engineer & Architect's Jrnl. 1 237/2 As the water warms, it rises through the pipe into the expansion box... To guard against the danger of exceeding the proper degree of heat, the expansion box is furnished with a pipe. 1939 Jrnl. Royal Aeronaut. Soc. 43 748 The exhaust gases from a group of cylinders are discharged through a number of expansion boxes, the expansion boxes being shaped as a flattened streamline member lying in the airstream. expansion card n. Computing = expansion board n. above. ΘΚΠ society > computing and information technology > hardware > [noun] > electronic component, circuitry > expansion board memory board1955 sound card1971 expansion board1978 accelerator board1981 accelerator card1982 expansion card1982 1982 Pract. Computing Nov. 66 Very reasonably priced for those who already have an Apple II and expansion card. 1986 Managem. Accounting Aug. 56 If all the sockets on the Mother Board are filled..you will have to install an ‘expansion card’ to increase its memory. expansion chamber n. see expansion apparatus n. ΚΠ 1933 Discovery Apr. 107/2 This recoiling nucleus..is an efficient ionizer and so can be detected either by its electrical effect or its track can be photographed in an expansion chamber. 1968 Practical Motorist Nov. 333/1 Expansion tank (chamber), a small tank connected to the overflow of the radiator on some modern cars which collects water and steam forced through the overflow pipe. The water is drawn back into the main system when the engine cools. expansion-coupling n. (see quots.). ΚΠ 1874 E. H. Knight Pract. Dict. Mech. I. 816/2 Expansion-coupling. The coupling represented consists of an expansion-drum of thin copper x between the extremities of two pipes a i, Fig. 1901, which, in elongating, press the sides of the drum in, and draw them out in cooling. expansion-curb n. (see quots.). ΚΠ 1847 J. Craig New Universal Dict. Expansion curb, in Horology, a contrivance for counteracting expansion or contraction. expansion-drum n. (see quots.). ΚΠ 1874 E. H. Knight Pract. Dict. Mech. I. 816/2 Expansion-drum, an arrangement by which an occasional change of speed may be effected. expansion-engine n. (see 7). ΚΠ 1847 J. Craig New Universal Dict. Expansion engine. 1886 Pall Mall Gaz. 21 Sept. 13/2 These steamers..are provided with triple expansion engines. expansion-gear n. an apparatus for cutting off steam from the cylinder at a given point of the stroke. ΚΠ 1850 Pract. Mech. Jrnl. 3 28 (heading) Whitelaw's steam-engine expansion gear. 1875 R. F. Martin tr. J. Havrez On Recent Improvem. Winding Machinery 80 MM. Scohy and Crespin add to the regular form of cylinder the expansion gear of M. Meyer. expansion-joint n. (see quots.). ΚΠ 1849 J. Weale Rudim. Dict. Terms Archit. ii. 179/1 Expansion-joint, a stuffing-box joint connecting the steam pipes, so as to allow one of them to slide within the enlarged end of the other when the length increases by expansion. 1864 Webster's Amer. Dict. Eng. Lang. Expansion-joint, an attachment of the framing to the boiler, which allows the boiler to expand without bending the framing. 1882 Worcs. Exhib. Catal. iii. 5 Samples of improved expansion joints. expansion-slide n. a slide belonging to the expansion-valve n. ΚΠ 1848 W. Pole tr. E. Alban High-pressure Steam Engine 261 The expansion slide is made to act through the motion of the principal slide below. expansion-valve n. a valve which shuts off the steam in its passage to the cylinder. ΚΠ 1849 Fairbairn in Mechanics' Mag. 51 255 A new construction of expansion valves for condensing steam engines. Draft additions 1993 expansion slot n. Computing a socket in a piece of computing equipment to which an expansion board may be connected. ΘΚΠ society > computing and information technology > hardware > [noun] > electronic component, circuitry > expansion slot slot1978 expansion slot1980 1980 Practical Computing Aug. 82 (caption) The basic Tuscan board featuring the Z-80 CPU, 8k RAM, 8k ROM, on-board video and 1/0 section with five spare S-100 expansion slots. 1990 Which? Nov. 651/1 Many have expansion slots so that you can add extra memory, for example, but these are specific to each manufacturer, and your choice is limited. This entry has not yet been fully updated (first published 1894; most recently modified version published online March 2022). < n.1611
随便看	rhinologist rhinologists rhinology rhinolophid rhinopharyngeal rhinopharyngitides rhinopharyngitis rhinopharynx rhinophore rhinophyma rhinoplastic rhinoplasties rhinoplasty rhinopneumonitis rhinorrhoea rhinos rhinoscleroma rhinoscope rhinoscopes rhinoscopic rhinoscopically rhinoscopies rhinoscopy rhinosinusitis rhinosporidial