eductionn.

Brit.

/ᵻˈdʌkʃn/, U.S.

/iˈdəkʃ(ə)n/,

/ɪˈdəkʃ(ə)n/

Forms: Middle English educcion, Middle English educcioun, 1500s– eduction.

Origin: A borrowing from Latin. Etymons: Latin ēductiōn-, ēductiō.

Etymology: < classical Latin ēductiōn-, ēductiō action of leading out (of troops), in post-classical Latin also (of people in general) action of leading out or away (4th cent.), (in medical context) discharge, purging (6th cent.), act of inferring a principle or conclusion from premises or available data (13th cent. in British sources) < ēduct- , past participial stem of ēdūcere to lead forth (see educe v.) + -iō -ion suffix¹. Compare Middle French eduction (second third of the 15th cent. in a translation of Chauliac; also a1500 in an apparently isolated instance in specific sense ‘expectoration’), Spanish educción (1493 as †educion in a translation of Chauliac; rare before 18th cent.). Compare eductive adj.

†1. Medicine. The excretion, expulsion, or removal of something from the body. Obsolete.

ΘΚΠ

the world > health and disease > healing > medical treatment > treatments removing or dispersing matter > [noun] > dispersing, etc., of humours or morbid matter

resolvinga1398

attractiona1400

resolutiona1400

repercussion?a1425

eduction?c1425

discussion1583

repulsion1583

epicrasis1592

derivation1600

expurgation1615

attractation1616

incision1626

diversion1656

dispersion1753

?c1425 tr. Guy de Chauliac Grande Chirurgie (Paris) (1971) 113 The curacioun conteyneþ..educcioun .i. ledynge forth [L. eductione] by þe vryne.

1592 N. Gyer Eng. Phlebotomy iii. 25 Touching the definition what it is: Phlebotomia..is an artificiall eduction of bloud.

1657 R. Tomlinson tr. J. de Renou Physical Inst. iv, in Medicinal Dispensatory sig. T We shall not need to suspect any harme by the eduction of some of them.

1684 tr. T. Bonet Guide Pract. Physician xiv. 493 The eduction of the Matter is hindred.

1710 T. Fuller Pharmacopœia Extemporanea 180 The true cure..consists in the..Eduction of..Phlegm.

1764 Med. Museum III. 191 The rash smatterers in midwifery often act unadvisedly, being impatient to promote the eduction of the secundines.

1831 G. Collier Transl. Eight Bks. Celsus (ed. 2) vii. xxix. 318 If the body have begun to swell, neither the introduction of the hands, nor the eduction of the fetus can be effected but with the greatest difficulty.

†2.

a. The action of leading out or bringing forth a person or thing from somewhere; an act of this. Obsolete.rare before and after 17th cent.

ΘΚΠ

society > faith > aspects of faith > Bible, Scripture > biblical events > [noun] > departure of Israelites from Egypt

eduction1654

?a1475 (?a1425) tr. R. Higden Polychron. (Harl. 2261) (1874) V. 239 The educcion [L. eductio] of Seynte Petyr from prison was abowte the feste of Ester.

1650 W. Charleton tr. J. B. van Helmont Ternary of Paradoxes 61 So also were all his [sc. Adam's] heroick and imperial faculties withdrawn behind a cloud, and so oppressed with the opacity of fleshly lusts, that ever since they stand in need of excitement and eduction from that Cimmerian umbrage.

1654 J. Trapp Comm. Job i. 13 Israel's eduction out of Egypt.

1680 E. Polhill Christus in Corde vii. 203 They have the power of his death in mortification, and the power of his resurrection in a Divine life; the one is notably adumbrated in the baptismal immersion into the Water; the other in the eduction out of it.

1839 R. Owen & A. Campbell Deb. on Evidences Christianity 349 The miraculous displays which we see distinguished their history, from their eduction from Egypt till they were carried into Babylon by the Assyrian monarch.

b. A sticking out of the tongue. Obsolete. rare.

ΘΚΠ

the world > space > relative position > posture > position of specific body parts > [noun] > tongue

eduction1649

lolling1872

1649 J. Bulwer Pathomyotomia ii. x. 233 This ironicall eduction of the Tongue.

c. Science. The transfer or conveyence of something; the action of obtaining from. Obsolete.

ΚΠ

1796 E. Darwin Zoonomia (ed. 2) I. 121 By the experiments published by Mr. Bennet, with his ingenious doubler of electricity, which is the greatest discovery made in that science since the coated jar, and the eduction of lightning from the skies.

a1802 E. Darwin Temple of Nature (1803) (Additional Notes) 81 The eduction of magnetism from the earth appears from the following experiment: if a bar of iron be set upright on the earth in this part of the world, it becomes in a short time magnetical.

1816 O. Goldsmith Hist. Earth & Animated Nature (new ed.) I. xxi. 319 In thunder-storms, a precipitation of the water seems to be either the cause or the consequence of the eduction of electricity; but it appears more probable, that the water is condensed into clouds by the eduction of its heat.

1858 J. Copland Dict. Pract. Med. III. ii. 1051/2 Humid states of the atmosphere, and whatever favours the transfer or eduction of electricity from the frame.

a. The action of bringing out or developing something from a state of latent, rudimentary, or potential existence; an instance or result of this.

ΚΠ

1606 T. Bell Regiment of Church viii. 93 Such was the eduction of Eve out of the side of Adam, when he was a sleepe.

1655 R. Capel Tentations iv. ii. 78 But the work [of sin] must begin at the inward eductions and motions of the will.

a1676 M. Hale Primitive Originat. Mankind (1677) iv. ii. 295 This eduction..of the Light should begin and be continued..for the first three Days of the World.

1686 J. Goad Astro-meteorologica i. ix. 35 The Power of Matter, and Eduction therefrom, are meer Words.

a1743 A. M. Ramsay Philos. Princ. Nat. & Revealed Relig. (1748) I. ii. 116 The schoolmen..say that God contains the essence of finite beings eminently and virtually. This dark phrase may be interpreted as if he produced them by emanation, eduction, extraposition.

1787 J. Berington Hist. Lives Abeillard & Heloisa iii. 131 If therefore there be any good, which remains unrealised, it was his wisdom which forbad its eduction.

1842 H. Mayhew What to teach & how to teach It i. iv. 5 It is the eduction of the pupil's nature which constitutes the education of the pupil.

1865 D. Masson Recent Brit. Philos. 70 [Sensible objects] are not the actual existences out of us, but only..eductions by our physiology out of a ‘something’.

1908 Business Philosopher Aug. 502 This psychical and physical evolution of man is dependent upon the development, eduction, drawing out of his positive qualities.

2002 Rev. Metaphysics 55 785 In a typical instance of the eduction of a form from matter, the form comes to exist in the matter as subject and as it is a material cause.

b. Chemistry. The action of isolating a substance from a compound or mixture in which it is present; extraction. Now rare.

ΘΚΠ

the world > matter > chemistry > chemical reactions or processes > [noun] > chemical reactions or processes (named) > extraction

extraction1605

prolectation1617

extractinga1626

eduction1651

1651 J. French tr. J. R. Glauber Descr. New Philos. Furnaces iv. 249 Surely we might refine the impurity, in which gold and silver lye hid, as in black shales, and powerfully extract gold and silver, which is not a transmutation of metals, but an eduction of gold and silver from the dunghil.

1666 R. Boyle Origine Formes & Qualities 149 Tis hard to conceive, how a Substance can be educ'd out of another Substance totally distinct in Nature from it, without being, before such Eduction, actually existent in it.

1757 tr. J. F. Henckel Pyritologia xii. 219 You come to calculate the number of centners of such ore, necessary for the eduction of a mark of silver.

1852 T. Griffiths Outl. Chem. vii. 41 Eduction of Elements. I have stated that very few Elements are found naturally pure or in a simple state, and that most of them are educed from their compounds.

?1877 Punjab Rec. 1876 11 (Supreme Govt. Orders) 51 The license for the manufacture and refinement of saltpetre and for the eduction of salt therefrom shall be in the form given in schedule E.

1922 Mining & Sci. Press 4 Mar. 283/1 We are informed, by the Montrose paper, that Mr. Beam in the course of experiments for the ‘eduction of oil from shales’—a really good word that, ‘eduction’—stumbled upon his epoch-making discovery.

4. The inferring of a principle, conclusion, etc., from premises or available data. Also: a result of this, an inference; cf. educt n. 3.

ΘΚΠ

the mind > mental capacity > understanding > reason, faculty of reasoning > process of reasoning, ratiocination > process of inferring, inference > [noun]

reasoning?c1400

collection1529

conclusion1532

induction1551

inferring1571

remotion1587

syllogism1588

deduction1593

inference1593

inferment1593

extraction1622

eduction1654

perduction1656

reducementa1750

deducing1826

vertical thinking1966

1654 J. Owen Doctr. Saints Perseverance xvi. 390 It hath to evade the eduction of any Truth whatever, from any place of Scripture whatever.

1785 F. O'Gallagher Ess. First Princ. Nature: Pt. II viii. 63 Scripture confirms this eduction from experience and reason.

a1856 W. Hamilton Lect. Metaphysics (1860) IV. App. 255 The logicians have..limited reasoning..to a mediate eduction of one proposition out of the correlation of two others.

1890 E. E. C. Jones Elem. Logic xix. 143 These may be called Mixed Eductions, or Transversions.

1954 A. Anastasi Psychol. Testing x. 261 This test, designed as a measure of Spearman's g factor, requires primarily the eduction of relationships within abstract material.

1993 S. di Nuovo in J. Brzeziński Creativity & Consciousness vi. 332 It is possible to keep attention without awareness and without consiousness.., and this happens in the semantic eduction from unattended stimuli, in incidental learning.

5. Mechanics.

a. The passage of steam, water, or vapour out of a vessel through a pipe or tube provided for the purpose; spec. (in a steam engine) the exit of steam from the cylinder after it has done its work in propelling the piston; cf. exhaust n. 1a(a) and the note there. Usually attributive (see Compounds). Now chiefly historical.

ΘΚΠ

society > occupation and work > equipment > machine > machines which impart power > engine > steam engine > [noun] > steam > exit of waste steam

eduction1744

exhaust1848

exhaustion1849

1744 J. T. Desaguliers Course Exper. Philos. II. 471 There is a Pipe coming from the Bottom of the Cylinder..call'd the Eduction-Pipe, thro' which the Water that has been injected, comes down every time the Steam is let into the Cylinder.

1828 Repertory Patent Inventions 5 416 Two other apertures are made in the same plates, for the eduction of the steam from the portion of the annular channel which is being emptied.

1851 Mechanics' Mag. 27 Sept. 255/2 Double passages in the valve and seat on the exhaust side, for facilitating the admission and eduction of steam into and from the cylinder.

1859 U.S. Patent 23,876 1/1 The means of effecting the induction and eduction of air in the two cylinders.

1878 J. Bourne Examples Steam, Air, & Gas Engines App. p. cxx/2 In these engines..the eduction was not through the top of the valve, but through the bottom.

1910 Chem. Engin. 8 656/1 Mr. Hixon's ideas..have to do with the eduction of zinc vapor from the furnace to the condenser.

2001 R. Bosewitz et al. tr. H. Kipphan Handbk. Print Media i. 170/2 Evaporative Drying... The following processes take place: conversion from liquid (solvent) into vapor state and eduction of steam generated or steam-loaded air.

†b. An eduction valve; an exhaust valve. Obsolete.

ΘΚΠ

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

scape-pipe1838

eduction1839

nozzle1839

port1839

exhaust1848

porthole1854

society > occupation and work > equipment > machine > machines which impart power > engine > steam engine > [noun] > parts of > valves > for expelling air

snifting clack1744

snifting pipe1744

snifting valve1744

eduction1839

tail-valve1839

1839 R. S. Robinson Naut. Steam Engine Explained 102 The steam will be cut off..but the eduction will remain open.

1865 J. C. E. Bourne Handbk. Steam-engine iii. 194 In such engines there will be a loss from opening the eduction much before the end of the stroke.

6. The bringing about or occasioning of an act, event, emotion, etc. Cf. educe v. 4.

ΘΚΠ

the world > existence and causation > causation > [noun] > causing

purchase1490

occasionc1515

occasioning1547

educing1592

inducing1626

causation1646

causing1651

induction1660

evocation1775

eductiona1806

educement1839

superinduction1842

a1806 H. K. White Remains (1807) II. 278 We see..men sedulously employed in the eduction of their own ruin.

1917 A. F. Sheldon Sci. of Business V. x. 96 There are two more steps to take in the ‘eduction’ of the constructive feeling.

2005 S. R. Lindsay Handbk. Appl. Dog Behavior & Training I. vii. 371 Provocative stimulation resulting in the loss of trust by a familiar social object may result in..the eduction of a momentary loss of control over aggressive impulses.

Compounds

General attributive in sense 5a, as eduction pipe, eduction steam, eduction valve, etc.

ΚΠ

1744Eduction-pipe [see sense 5a].

a1792 J. Smeaton Reports (1797) I. 224 The hole I. answers the steam-pipe and regulator; and the hole K. the eduction or sinking pipe.

1829 ‘R. Stuart’ Anecd. Steam Engines II. 374 g.g. Exhausting or eduction valves.

1841 J. S. Russell Treat. Steam-engine 201 The eduction valves, ports, and passages by which the steam enters the condenser.

1859 W. J. M. Rankine Man. Steam Engine (1861) 486 An eduction valve..to let the steam escape to the condenser.

1874 E. H. Knight Amer. Mech. Dict. I. 664/2 This is accomplished by closing the eduction-port a little before the end of the stroke.

1889 Science 22 Feb. 134/2 H H shows the position of the induction, and I I of the eduction valves.

1908 R. Kipling in D. Knight 100 Years Sci. Fiction (1969) 19 A chill greyish-green liquid that drains..through the eduction-pipes and the mains back to the bilges.

1922 Marine Rev. Aug. 357/1 In the jet condenser the exhaust steam is admitted through the eduction pipe.

2000 P. W. B. Semmens & A. J. Goldfinch How Steam Locomotives really Work i. 8 Newcomen found it necessary to sweep the air out of his cylinders by letting the steam drive it out through the ‘eduction pipe’ used to remove the condensate.

This entry has been updated (OED Third Edition, March 2012; most recently modified version published online March 2022).

单词	eduction
释义	eductionn. Brit. /ᵻˈdʌkʃn/, U.S. /iˈdəkʃ(ə)n/, /ɪˈdəkʃ(ə)n/ Forms: Middle English educcion, Middle English educcioun, 1500s– eduction. Origin: A borrowing from Latin. Etymons: Latin ēductiōn-, ēductiō. Etymology: < classical Latin ēductiōn-, ēductiō action of leading out (of troops), in post-classical Latin also (of people in general) action of leading out or away (4th cent.), (in medical context) discharge, purging (6th cent.), act of inferring a principle or conclusion from premises or available data (13th cent. in British sources) < ēduct- , past participial stem of ēdūcere to lead forth (see educe v.) + -iō -ion suffix¹. Compare Middle French eduction (second third of the 15th cent. in a translation of Chauliac; also a1500 in an apparently isolated instance in specific sense ‘expectoration’), Spanish educción (1493 as †educion in a translation of Chauliac; rare before 18th cent.). Compare eductive adj. †1. Medicine. The excretion, expulsion, or removal of something from the body. Obsolete. ΘΚΠ the world > health and disease > healing > medical treatment > treatments removing or dispersing matter > [noun] > dispersing, etc., of humours or morbid matter resolvinga1398 attractiona1400 resolutiona1400 repercussion?a1425 eduction?c1425 discussion1583 repulsion1583 epicrasis1592 derivation1600 expurgation1615 attractation1616 incision1626 diversion1656 dispersion1753 ?c1425 tr. Guy de Chauliac Grande Chirurgie (Paris) (1971) 113 The curacioun conteyneþ..educcioun .i. ledynge forth [L. eductione] by þe vryne. 1592 N. Gyer Eng. Phlebotomy iii. 25 Touching the definition what it is: Phlebotomia..is an artificiall eduction of bloud. 1657 R. Tomlinson tr. J. de Renou Physical Inst. iv, in Medicinal Dispensatory sig. T We shall not need to suspect any harme by the eduction of some of them. 1684 tr. T. Bonet Guide Pract. Physician xiv. 493 The eduction of the Matter is hindred. 1710 T. Fuller Pharmacopœia Extemporanea 180 The true cure..consists in the..Eduction of..Phlegm. 1764 Med. Museum III. 191 The rash smatterers in midwifery often act unadvisedly, being impatient to promote the eduction of the secundines. 1831 G. Collier Transl. Eight Bks. Celsus (ed. 2) vii. xxix. 318 If the body have begun to swell, neither the introduction of the hands, nor the eduction of the fetus can be effected but with the greatest difficulty. †2. a. The action of leading out or bringing forth a person or thing from somewhere; an act of this. Obsolete.rare before and after 17th cent. ΘΚΠ society > faith > aspects of faith > Bible, Scripture > biblical events > [noun] > departure of Israelites from Egypt eduction1654 ?a1475 (?a1425) tr. R. Higden Polychron. (Harl. 2261) (1874) V. 239 The educcion [L. eductio] of Seynte Petyr from prison was abowte the feste of Ester. 1650 W. Charleton tr. J. B. van Helmont Ternary of Paradoxes 61 So also were all his [sc. Adam's] heroick and imperial faculties withdrawn behind a cloud, and so oppressed with the opacity of fleshly lusts, that ever since they stand in need of excitement and eduction from that Cimmerian umbrage. 1654 J. Trapp Comm. Job i. 13 Israel's eduction out of Egypt. 1680 E. Polhill Christus in Corde vii. 203 They have the power of his death in mortification, and the power of his resurrection in a Divine life; the one is notably adumbrated in the baptismal immersion into the Water; the other in the eduction out of it. 1839 R. Owen & A. Campbell Deb. on Evidences Christianity 349 The miraculous displays which we see distinguished their history, from their eduction from Egypt till they were carried into Babylon by the Assyrian monarch. b. A sticking out of the tongue. Obsolete. rare. ΘΚΠ the world > space > relative position > posture > position of specific body parts > [noun] > tongue eduction1649 lolling1872 1649 J. Bulwer Pathomyotomia ii. x. 233 This ironicall eduction of the Tongue. c. Science. The transfer or conveyence of something; the action of obtaining from. Obsolete. ΚΠ 1796 E. Darwin Zoonomia (ed. 2) I. 121 By the experiments published by Mr. Bennet, with his ingenious doubler of electricity, which is the greatest discovery made in that science since the coated jar, and the eduction of lightning from the skies. a1802 E. Darwin Temple of Nature (1803) (Additional Notes) 81 The eduction of magnetism from the earth appears from the following experiment: if a bar of iron be set upright on the earth in this part of the world, it becomes in a short time magnetical. 1816 O. Goldsmith Hist. Earth & Animated Nature (new ed.) I. xxi. 319 In thunder-storms, a precipitation of the water seems to be either the cause or the consequence of the eduction of electricity; but it appears more probable, that the water is condensed into clouds by the eduction of its heat. 1858 J. Copland Dict. Pract. Med. III. ii. 1051/2 Humid states of the atmosphere, and whatever favours the transfer or eduction of electricity from the frame. 3. a. The action of bringing out or developing something from a state of latent, rudimentary, or potential existence; an instance or result of this. ΚΠ 1606 T. Bell Regiment of Church viii. 93 Such was the eduction of Eve out of the side of Adam, when he was a sleepe. 1655 R. Capel Tentations iv. ii. 78 But the work [of sin] must begin at the inward eductions and motions of the will. a1676 M. Hale Primitive Originat. Mankind (1677) iv. ii. 295 This eduction..of the Light should begin and be continued..for the first three Days of the World. 1686 J. Goad Astro-meteorologica i. ix. 35 The Power of Matter, and Eduction therefrom, are meer Words. a1743 A. M. Ramsay Philos. Princ. Nat. & Revealed Relig. (1748) I. ii. 116 The schoolmen..say that God contains the essence of finite beings eminently and virtually. This dark phrase may be interpreted as if he produced them by emanation, eduction, extraposition. 1787 J. Berington Hist. Lives Abeillard & Heloisa iii. 131 If therefore there be any good, which remains unrealised, it was his wisdom which forbad its eduction. 1842 H. Mayhew What to teach & how to teach It i. iv. 5 It is the eduction of the pupil's nature which constitutes the education of the pupil. 1865 D. Masson Recent Brit. Philos. 70 [Sensible objects] are not the actual existences out of us, but only..eductions by our physiology out of a ‘something’. 1908 Business Philosopher Aug. 502 This psychical and physical evolution of man is dependent upon the development, eduction, drawing out of his positive qualities. 2002 Rev. Metaphysics 55 785 In a typical instance of the eduction of a form from matter, the form comes to exist in the matter as subject and as it is a material cause. b. Chemistry. The action of isolating a substance from a compound or mixture in which it is present; extraction. Now rare. ΘΚΠ the world > matter > chemistry > chemical reactions or processes > [noun] > chemical reactions or processes (named) > extraction extraction1605 prolectation1617 extractinga1626 eduction1651 1651 J. French tr. J. R. Glauber Descr. New Philos. Furnaces iv. 249 Surely we might refine the impurity, in which gold and silver lye hid, as in black shales, and powerfully extract gold and silver, which is not a transmutation of metals, but an eduction of gold and silver from the dunghil. 1666 R. Boyle Origine Formes & Qualities 149 Tis hard to conceive, how a Substance can be educ'd out of another Substance totally distinct in Nature from it, without being, before such Eduction, actually existent in it. 1757 tr. J. F. Henckel Pyritologia xii. 219 You come to calculate the number of centners of such ore, necessary for the eduction of a mark of silver. 1852 T. Griffiths Outl. Chem. vii. 41 Eduction of Elements. I have stated that very few Elements are found naturally pure or in a simple state, and that most of them are educed from their compounds. ?1877 Punjab Rec. 1876 11 (Supreme Govt. Orders) 51 The license for the manufacture and refinement of saltpetre and for the eduction of salt therefrom shall be in the form given in schedule E. 1922 Mining & Sci. Press 4 Mar. 283/1 We are informed, by the Montrose paper, that Mr. Beam in the course of experiments for the ‘eduction of oil from shales’—a really good word that, ‘eduction’—stumbled upon his epoch-making discovery. 4. The inferring of a principle, conclusion, etc., from premises or available data. Also: a result of this, an inference; cf. educt n. 3. ΘΚΠ the mind > mental capacity > understanding > reason, faculty of reasoning > process of reasoning, ratiocination > process of inferring, inference > [noun] reasoning?c1400 collection1529 conclusion1532 induction1551 inferring1571 remotion1587 syllogism1588 deduction1593 inference1593 inferment1593 extraction1622 eduction1654 perduction1656 reducementa1750 deducing1826 vertical thinking1966 1654 J. Owen Doctr. Saints Perseverance xvi. 390 It hath to evade the eduction of any Truth whatever, from any place of Scripture whatever. 1785 F. O'Gallagher Ess. First Princ. Nature: Pt. II viii. 63 Scripture confirms this eduction from experience and reason. a1856 W. Hamilton Lect. Metaphysics (1860) IV. App. 255 The logicians have..limited reasoning..to a mediate eduction of one proposition out of the correlation of two others. 1890 E. E. C. Jones Elem. Logic xix. 143 These may be called Mixed Eductions, or Transversions. 1954 A. Anastasi Psychol. Testing x. 261 This test, designed as a measure of Spearman's g factor, requires primarily the eduction of relationships within abstract material. 1993 S. di Nuovo in J. Brzeziński Creativity & Consciousness vi. 332 It is possible to keep attention without awareness and without consiousness.., and this happens in the semantic eduction from unattended stimuli, in incidental learning. 5. Mechanics. a. The passage of steam, water, or vapour out of a vessel through a pipe or tube provided for the purpose; spec. (in a steam engine) the exit of steam from the cylinder after it has done its work in propelling the piston; cf. exhaust n. 1a(a) and the note there. Usually attributive (see Compounds). Now chiefly historical. ΘΚΠ society > occupation and work > equipment > machine > machines which impart power > engine > steam engine > [noun] > steam > exit of waste steam eduction1744 exhaust1848 exhaustion1849 1744 J. T. Desaguliers Course Exper. Philos. II. 471 There is a Pipe coming from the Bottom of the Cylinder..call'd the Eduction-Pipe, thro' which the Water that has been injected, comes down every time the Steam is let into the Cylinder. 1828 Repertory Patent Inventions 5 416 Two other apertures are made in the same plates, for the eduction of the steam from the portion of the annular channel which is being emptied. 1851 Mechanics' Mag. 27 Sept. 255/2 Double passages in the valve and seat on the exhaust side, for facilitating the admission and eduction of steam into and from the cylinder. 1859 U.S. Patent 23,876 1/1 The means of effecting the induction and eduction of air in the two cylinders. 1878 J. Bourne Examples Steam, Air, & Gas Engines App. p. cxx/2 In these engines..the eduction was not through the top of the valve, but through the bottom. 1910 Chem. Engin. 8 656/1 Mr. Hixon's ideas..have to do with the eduction of zinc vapor from the furnace to the condenser. 2001 R. Bosewitz et al. tr. H. Kipphan Handbk. Print Media i. 170/2 Evaporative Drying... The following processes take place: conversion from liquid (solvent) into vapor state and eduction of steam generated or steam-loaded air. †b. An eduction valve; an exhaust valve. Obsolete. ΘΚΠ society > occupation and work > equipment > machine > machines which impart power > engine > steam engine > [noun] > steam > aperture for scape-pipe1838 eduction1839 nozzle1839 port1839 exhaust1848 porthole1854 society > occupation and work > equipment > machine > machines which impart power > engine > steam engine > [noun] > parts of > valves > for expelling air snifting clack1744 snifting pipe1744 snifting valve1744 eduction1839 tail-valve1839 1839 R. S. Robinson Naut. Steam Engine Explained 102 The steam will be cut off..but the eduction will remain open. 1865 J. C. E. Bourne Handbk. Steam-engine iii. 194 In such engines there will be a loss from opening the eduction much before the end of the stroke. 6. The bringing about or occasioning of an act, event, emotion, etc. Cf. educe v. 4. ΘΚΠ the world > existence and causation > causation > [noun] > causing purchase1490 occasionc1515 occasioning1547 educing1592 inducing1626 causation1646 causing1651 induction1660 evocation1775 eductiona1806 educement1839 superinduction1842 a1806 H. K. White Remains (1807) II. 278 We see..men sedulously employed in the eduction of their own ruin. 1917 A. F. Sheldon Sci. of Business V. x. 96 There are two more steps to take in the ‘eduction’ of the constructive feeling. 2005 S. R. Lindsay Handbk. Appl. Dog Behavior & Training I. vii. 371 Provocative stimulation resulting in the loss of trust by a familiar social object may result in..the eduction of a momentary loss of control over aggressive impulses. Compounds General attributive in sense 5a, as eduction pipe, eduction steam, eduction valve, etc. ΚΠ 1744Eduction-pipe [see sense 5a]. a1792 J. Smeaton Reports (1797) I. 224 The hole I. answers the steam-pipe and regulator; and the hole K. the eduction or sinking pipe. 1829 ‘R. Stuart’ Anecd. Steam Engines II. 374 g.g. Exhausting or eduction valves. 1841 J. S. Russell Treat. Steam-engine 201 The eduction valves, ports, and passages by which the steam enters the condenser. 1859 W. J. M. Rankine Man. Steam Engine (1861) 486 An eduction valve..to let the steam escape to the condenser. 1874 E. H. Knight Amer. Mech. Dict. I. 664/2 This is accomplished by closing the eduction-port a little before the end of the stroke. 1889 Science 22 Feb. 134/2 H H shows the position of the induction, and I I of the eduction valves. 1908 R. Kipling in D. Knight 100 Years Sci. Fiction (1969) 19 A chill greyish-green liquid that drains..through the eduction-pipes and the mains back to the bilges. 1922 Marine Rev. Aug. 357/1 In the jet condenser the exhaust steam is admitted through the eduction pipe. 2000 P. W. B. Semmens & A. J. Goldfinch How Steam Locomotives really Work i. 8 Newcomen found it necessary to sweep the air out of his cylinders by letting the steam drive it out through the ‘eduction pipe’ used to remove the condensate. This entry has been updated (OED Third Edition, March 2012; most recently modified version published online March 2022). < n.?c1425
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