dynamicadj.n.

Brit.

/dʌɪˈnamɪk/,

/dᵻˈnamɪk/, U.S.

/daɪˈnæmɪk/

Etymology: < French dynamique (Leibniz 1692. Dict. Acad. 1762), < Greek δυναμικός powerful, < δύναμις power, strength.

A. adj.

1. Of or pertaining to force producing motion: often opposed to static.

ΘΚΠ

the world > movement > impelling or driving > [adjective]

dynamic1827

dynamical1828

1827 D. Gilbert in Philos. Trans. (Royal Soc.) 142 26 Mr. Watt..assumed one pound raised one foot high for what has been called in other countries the dynamic unit.

1846 W. R. Grove On Correlation Physical Forces 13 A comparative view of the corpuscular and dynamic theories of heat.

1847 J. Dwyer Princ. & Pract. Hydraul. Engin. 94 The horse's power is principally used by Engineers in this country as a Dynamic unit.

1850 W. R. Grove On Correlation Physical Forces (ed. 2) 74 I have used..the terms dynamic and static to represent the different states of magnetism.

1855 H. Spencer Princ. Psychol. ii. x. 192 We find light producing a dynamic effect..in those changes of atomic arrangement which it causes in certain crystals.

1860 J. Tyndall Glaciers of Alps ii. xix. 331 According to the dynamic view..heat is regarded as a motion.

1881 Armstrong Addr. Brit. Assoc. in Nature No. 619. 449 Such is the richness of coal as a store of mechanical energy that a pound of coal, even as used in the steam-engine, produces a dynamic effect about five times greater than a pound of gunpowder burnt in a gun.

2. Of or pertaining to force in action or operation; active.

ΘΚΠ

the world > matter > physics > mechanics > dynamics > [adjective] > relating to force in operation

dynamical1828

dynamic1862

1862 J. Tyndall Mountaineering in 1861 i. 6 What would man be without Nature? A mere capacity, if such a thing be conceivable alone; potential, but not dynamic.

1863 J. Tyndall Heat v. 137 While in the act of falling, the energy of the weight is active. It may be called actual energy, in antithesis to possible, or..dynamic energy, in antithesis to potential.

1863 J. Tyndall Heat v. 138 As potential energy disappears, dynamic energy comes into play.

3. transferred and figurative.

a. Active, potent, energetic, effective, forceful.

ΘΚΠ

the world > action or operation > manner of action > vigour or energy > [adjective]

sprindeOE

livelyOE

kaskc1300

wightc1300

courageousc1386

wighty14..

wieldya1413

ablec1440

tall of hand1530

sappy1558

energical1565

energetical1585

greenya1586

stout1600

strenuous1602

forceful?1624

actuous1626

vigorous1638

vivid1638

high-spirited1653

hearty1665

actuose1677

living1699

full-blooded1707

executive1708

rugged1731

sousing1735

energic1740

bouncing1743

two-fisted1774

energetic1782

zestful1797

rollicking1801

through-ganging1814

throughgoing1814

slashing1828

high-powered1829

high pressure1834

rip-roaring1834

red-blooded1836

ripsnorting1846

zesty1853

dynamic1856

throbbing1864

goey1875

torpedoic1893

kinky1903

zippy1903

go-at-it1904

punchy1907

up-and-at-'em1909

driving1916

vibranta1929

kinetic1931

zinging1931

high-octane1936

zingy1938

slam-bang1939

balls-to-the-wall1967

balls-out1968

ass-kicking1977

hi-octane1977

1856 R. W. Emerson Eng. Traits xiv. 236 Their dynamic brains hurled off their words, as the revolving stone hurls off scraps of grit.

1876 ‘G. Eliot’ Daniel Deronda I. i. i. 3 What was the secret of form or expression which gave the dynamic quality to her glance?

1878 W. E. H. Lecky Hist. Eng. 18th Cent. I. i. 14 It [Greek intellect] has been the great dynamic agency in European civilisation.

b. Opposed to static.

ΚΠ

1876 C. P. Mason Eng. Gram. (ed. 21) 117 (To borrow a metaphor from mechanics) the adjective is a static attribute, the verb is a dynamic attribute.

4. Of, according to, or pertaining to the science of dynamics n.: as the dynamic theory of the tides.

ΘΚΠ

the world > matter > physics > mechanics > dynamics > [adjective]

dynamical1814

dynamic1838

1838–51 J. P. Nichol Archit. Heavens (ed. 9) 196 A sure dynamic theorem.

1891 E. Peacock Narcissa Brendon II. 416 The dynamic laws which cause a pump to act.

5. Medicine.

a. Functional, in contradistinction to organic; as in dynamic disease.

ΚΠ

1829 W. Stokes Path. Observ. in Westm. Rev. (1830) Jan. 308 On account of this debility being an essential character of typhoid fevers, I denominated them adynamic.]

1834 S. Cooper Good's Study Med. (ed. 4) IV. 272 Dr. Stoker..has divided dropsies into two kinds, dynamic and adynamic.

1855 J. R. Reynolds Diagnosis Dis. Brain ix The simple fact of convulsions is proof of dynamic (functional) disease.

1882 Med. Temp. Jrnl. 1 114 A dynamic narcosis of the ultimate fibres of sensation.

b. With Hahnemann and his followers: Of the nature of some immaterial or ‘spiritual’ influence.

ΚΠ

1881 J. G. Glover in Encycl. Brit. XII. 128/1 [article Homœopathy] Underlying all his [Hahnemann's] system..was the idea that the causes of disease were impalpable, immaterial, spiritual, dynamic.

Categories »

†c. Attended with a morbid increase of vital action, sthenic. Obsolete. dynamic school: a name given to the Stahlians, or followers of Stahl, as attributing the vital phenomena to the operation of an internal force or power acting for the most part independently of external causes. ( New Sydenham Soc. Lexicon)

6. In the Kantian philosophy: Relating to the reason of existence of an object of experience. dynamic relations, the relations between objects as forming parts of one connected experience: viz. the relations of substance and accident, of cause and effect, and of substances acting upon each other. dynamic category, a category that expresses one of the dynamic relations. dynamic synthesis, a synthesis which is guided by the dynamic categories.

7. Relating to the existence or action of some force or forces; applied esp. to a theory that accounts for matter, or for mind, as being merely the action of forces: see dynamism n. 1. dynamic theory of Kant, a theory according to which matter was conceived to be constituted by two antagonistic principles of attraction and repulsion.

ΚΠ

1817 S. T. Coleridge Biographia Literaria I. ix. 150 We had both equal obligations to the polar logic and dynamic philosophy of Giordano Bruno.

8. Music. Of, pertaining to, or indicating the volume of sound from a musical instrument or in a musical performance. Also transferred.

ΚΠ

1893–7 J. S. Shedlock tr. K. W. J. H. Riemann Dict. Music 226/1 The natural dynamic shading of a musical phrase is therefore crescendo..and diminuendo... Dynamic and agogic shadings must be used with economy.

1931 G. Jacob Orchestral Technique iii. 29 It is excellent as a bass-strengthener, however, in dynamic ranges of mf and upwards.

1941 B.B.C. Gloss. Broadcasting Terms 10 Dynamic range, range of intensities within which the volume of a programme fluctuates.

1948 Penguin Music Mag. June 129 Fearless attack, great volume, and subtle dynamic changes.

B. n.

1. = dynamics n.

ΘΚΠ

the world > movement > [noun] > laws of motion > study of

dynamics1788

kinematics1840

kinetics1864

dynamic1873

kinetic1873

the world > matter > physics > mechanics > dynamics > [noun]

dynamics1788

dynamic1873

1873 W. K. Clifford Syllabus Lect. in Math. Papers (1882) 516 The science which teaches under what circumstances particular motions take place..is called Dynamic..It is divided into two parts, Static..and Kinetic.

1878 W. K. Clifford (title) Elements of Dynamic: an Introduction to the Study of Motion and Rest in Solid and Fluid Bodies.

2. = Dynamic theory: see A. 7.

ΚΠ

1884 B. Bosanquet et al. tr. H. Lotze Metaphysic 305 As Kant does in the course of his ‘Proof’ of this ‘Precept No. 1’ of his ‘Dynamic’.

3. Energizing or motive force.

ΘΚΠ

the world > action or operation > manner of action > vigour or energy > [noun] > vigour or liveliness > imparting vigour or liveliness > one who or that which

actative1605

fillip1699

energizer1804

flip1881

dynamic1894

pepper-up1934

pepper-upper1934

1894 H. Drummond Lowell Lect. Ascent of Man 270 The Struggle for Life, as life's dynamic, can never wholly cease.

1896 Advance (Chicago) 16 July 80/1 There is lack of dynamic. There is lack of direct soul-changing power.

4. Music. = dynamics n. 3.

ΘΚΠ

the world > physical sensation > hearing and noise > thing heard > [noun] > sound > quality of sound > volume > range of

dynamics1883

dynamic range1917

dynamic1959

1884 H. Riemann (title) Musikalische Dynamik und Agogik.]

1959 D. Cooke Lang. Music iii. 159 The minor system, soft dynamic, and slow tempo.

Compounds

dynamic braking n. = electric braking n. at electric adj. and n. Compounds 1b.

ΚΠ

1930 Engineering 24 Jan. 105/1 Driven by two 100 h.p. mill-type motors..equipped with solenoid and dynamic braking.

1950 Engineering 22 Dec. 528/2 Slip-ring induction motors with dynamic braking.

dynamic equator n. see quot. 1883.

ΚΠ

1883 Encycl. Brit. XVI. 165/1 The line connecting all the points where the magnetic intensity is least is called the dynamic equator.

dynamic metamorphism n. (dynamical metamorphism) Geology metamorphism produced by mechanical forces.

ΚΠ

1893 Jrnl. Geol. (Chicago) 1 854 The dynamic metamorphism of the eruptive rocks occurring in it.

1965 A. Holmes Princ. Physical Geol. (rev. ed.) viii. 170 Since the main process is dynamic, slate is said to be a product of dynamic metamorphism.

dynamic pressure n. the pressure in a fluid that is due to its motion.

ΚΠ

1919 A. B. Eason Flow & Measurem. Air & Gases ix. 163 Threlfall..mentions tests made upon a Pitot tube in which..there was a large suction effect, and..the difference between the static and dynamic pressures was of the form H = k(u)ⁿ, where n was greater than 2.

1949 O. G. Sutton Sci. of Flight ii. 36 The dynamic pressure of the flow..is the pressure felt on the nose of a body at the point where the impinging stream is actually brought to rest.

1970 A. C. Kermode Flight without Formulae (ed. 4) 43 A fluid can exert pressure for two reasons: first because of its movement... The pressure due to movement we will call dynamic pressure.

Draft additions 1993

dynamic range n. a range of acceptable or possible volumes of sound, esp. the range of volumes occurring in the course of a piece of music, performance, programme, etc.; spec. the ratio of the largest to the smallest intensity of sound that can be reliably transmitted or reproduced by a particular sound system.

ΘΚΠ

the world > physical sensation > hearing and noise > thing heard > [noun] > sound > quality of sound > volume > range of

dynamics1883

dynamic range1917

dynamic1959

1917 G. B. Shaw in Nation 28 July 430/1 Sir Thomas Beecham..seems to have no conception of the dynamic range of Mozart's effects.

1949 L. L. Beranek Acoustic Measurements xiv. 637 The dynamic range of a microphone is the range of levels of input signals which can usefully be transduced by the instrument. It is..limited at high levels by the amount of distortion which can be tolerated in the transduced signal.

1967 db Nov. 16/2 This technique can improve the dynamic range of the recorder up to 6 dB with attendant low distortion.

1980 Audio Jan. 52/1 Even these fine recordings are too often marred by the presence of record surface noise and restrictions on the dynamic range that could be captured on and retrieved from a vinyl disc.

Draft additions July 2010

dynamic HTML n. Computing HTML enhanced by other web technologies (such as a scripting language like Javascript) used to enable a web page to support changing content or interactive capabilities in such a way that page changes are displayed automatically by the browser and do not need to be individually requested from the web server; abbreviated DHTML.

ΘΚΠ

society > computing and information technology > data > [noun] > format

format1955

SGML1983

Standard Generalized Markup Language1983

Rich Text Format1986

RTF1986

CD-R1988

rich text1988

Hypertext Markup Language1992

PDF1992

HTML1993

dynamic HTML1995

Extensible Markup Language1996

XML1996

MathML1997

1995 Re: Registering Users/Passwords in comp.infosystems.www.providers (Usenet newsgroup) 20 Apr. We are currently putting together some demo software and C++ class libraries to do dynamic HTML and simple database access.

2000 Red Herring Mar. 100/2 Written in Dynamic HTML, it's a somewhat-capable Web-based spreadsheet that runs locally on your machine without relying on a high-bandwidth connection.

2009 S. St. Laurent & E. Dumbill Learning Rails xvi. 269 Most of what Ajax does today is what used to be called Dynamic HTML, or DHTML. DHTML built on regular HTML by adding JavaScript code that could change the underlying HTML.

Draft additions June 2004

dynamic pricing n. [ < dynamic adj. + pricing n., after Swedish dynamiska prisbildning (G. Myrdal Prisbildningsproblemet och föränderligheten (1927) i. 1)] Business the varying of a product's price to reflect changing market conditions; esp. the charging of higher prices at times of greater demand, in more affluent areas, etc.

ΚΠ

1929 E. Lindahl in Econ. Jrnl. 39 89 There are two quite distinct problems which are caused by the dynamic conditions of the economic life, depending on the point of view from which dynamic pricing is analysed.

1964 A. Isaacs & R. E. Slesinger Business, Govt. & Public Policy 178 Consumer free choice, dynamic pricing, and freedom to contract are fundamentals of the enterprise approach.

2000 Washington Post 27 Sept. a1/1 It was the first major Web test of a strategy called ‘dynamic pricing’, which gauges a shopper's desire, measures his means and then charges accordingly.

Draft additions July 2010

Computing. That changes or that can be changed while a program or operating system is running; that can be specified or performed at run time, rather than in advance. Cf. static adj. 10c.

ΚΠ

1978 J. M. Sakoda et al. in D. E. Bailey Computer Sci. in Social & Behavioral Sci. Education vii. 88 It is the lack of dynamic storage allocation that is at the base of artificial restrictions of table sizes, since fortran arrays must be allocated at the time a program is written.

1989 PC World Oct. 100/1 The program supports dynamic links to cells or ranges.

2007 R. Love Linux Syst. Programming 245 You need dynamic memory when the amount of memory that you will need, or how long you might need it, varies, and is not known before the program runs.

Draft additions December 2012

dynamic RAM n. Computing = DRAM n. at D n. Additions; cf. static RAM n. at static n. and adj. Compounds.

ΘΚΠ

society > computing and information technology > hardware > [noun] > primary storage or main memory > random access

random access1950

random-access memory1953

RAM1957

dynamic RAM1975

DRAM1981

1975 Computerworld 26 Feb. 36/2 Read-write memories include a 4K core module, a 1K static RAM and a 4K dynamic RAM.

1989 PC Mag. (U.K. ed.) May 24/4 The computer is equipped with 2Mbyte of dynamic RAM as standard.

1996 H. G. Cragon Memory Syst. & Pipelined Processors i. 2 Information on the reduction of access times of dynamic RAMS and static RAMS.

2012 Internat. Herald Tribune (Nexis) 14 Jan. (Finance section) 9 STT-RAM..is viewed by some as a future competitor for DRAM, or dynamic RAM.

This entry has not yet been fully updated (first published 1897; most recently modified version published online March 2022).

单词	dynamic
释义	dynamicadj.n. Brit. /dʌɪˈnamɪk/, /dᵻˈnamɪk/, U.S. /daɪˈnæmɪk/ Etymology: < French dynamique (Leibniz 1692. Dict. Acad. 1762), < Greek δυναμικός powerful, < δύναμις power, strength. A. adj. 1. Of or pertaining to force producing motion: often opposed to static. ΘΚΠ the world > movement > impelling or driving > [adjective] dynamic1827 dynamical1828 1827 D. Gilbert in Philos. Trans. (Royal Soc.) 142 26 Mr. Watt..assumed one pound raised one foot high for what has been called in other countries the dynamic unit. 1846 W. R. Grove On Correlation Physical Forces 13 A comparative view of the corpuscular and dynamic theories of heat. 1847 J. Dwyer Princ. & Pract. Hydraul. Engin. 94 The horse's power is principally used by Engineers in this country as a Dynamic unit. 1850 W. R. Grove On Correlation Physical Forces (ed. 2) 74 I have used..the terms dynamic and static to represent the different states of magnetism. 1855 H. Spencer Princ. Psychol. ii. x. 192 We find light producing a dynamic effect..in those changes of atomic arrangement which it causes in certain crystals. 1860 J. Tyndall Glaciers of Alps ii. xix. 331 According to the dynamic view..heat is regarded as a motion. 1881 Armstrong Addr. Brit. Assoc. in Nature No. 619. 449 Such is the richness of coal as a store of mechanical energy that a pound of coal, even as used in the steam-engine, produces a dynamic effect about five times greater than a pound of gunpowder burnt in a gun. 2. Of or pertaining to force in action or operation; active. ΘΚΠ the world > matter > physics > mechanics > dynamics > [adjective] > relating to force in operation dynamical1828 dynamic1862 1862 J. Tyndall Mountaineering in 1861 i. 6 What would man be without Nature? A mere capacity, if such a thing be conceivable alone; potential, but not dynamic. 1863 J. Tyndall Heat v. 137 While in the act of falling, the energy of the weight is active. It may be called actual energy, in antithesis to possible, or..dynamic energy, in antithesis to potential. 1863 J. Tyndall Heat v. 138 As potential energy disappears, dynamic energy comes into play. 3. transferred and figurative. a. Active, potent, energetic, effective, forceful. ΘΚΠ the world > action or operation > manner of action > vigour or energy > [adjective] sprindeOE livelyOE kaskc1300 wightc1300 courageousc1386 wighty14.. wieldya1413 ablec1440 tall of hand1530 sappy1558 energical1565 energetical1585 greenya1586 stout1600 strenuous1602 forceful?1624 actuous1626 vigorous1638 vivid1638 high-spirited1653 hearty1665 actuose1677 living1699 full-blooded1707 executive1708 rugged1731 sousing1735 energic1740 bouncing1743 two-fisted1774 energetic1782 zestful1797 rollicking1801 through-ganging1814 throughgoing1814 slashing1828 high-powered1829 high pressure1834 rip-roaring1834 red-blooded1836 ripsnorting1846 zesty1853 dynamic1856 throbbing1864 goey1875 torpedoic1893 kinky1903 zippy1903 go-at-it1904 punchy1907 up-and-at-'em1909 driving1916 vibranta1929 kinetic1931 zinging1931 high-octane1936 zingy1938 slam-bang1939 balls-to-the-wall1967 balls-out1968 ass-kicking1977 hi-octane1977 1856 R. W. Emerson Eng. Traits xiv. 236 Their dynamic brains hurled off their words, as the revolving stone hurls off scraps of grit. 1876 ‘G. Eliot’ Daniel Deronda I. i. i. 3 What was the secret of form or expression which gave the dynamic quality to her glance? 1878 W. E. H. Lecky Hist. Eng. 18th Cent. I. i. 14 It [Greek intellect] has been the great dynamic agency in European civilisation. b. Opposed to static. ΚΠ 1876 C. P. Mason Eng. Gram. (ed. 21) 117 (To borrow a metaphor from mechanics) the adjective is a static attribute, the verb is a dynamic attribute. 4. Of, according to, or pertaining to the science of dynamics n.: as the dynamic theory of the tides. ΘΚΠ the world > matter > physics > mechanics > dynamics > [adjective] dynamical1814 dynamic1838 1838–51 J. P. Nichol Archit. Heavens (ed. 9) 196 A sure dynamic theorem. 1891 E. Peacock Narcissa Brendon II. 416 The dynamic laws which cause a pump to act. 5. Medicine. a. Functional, in contradistinction to organic; as in dynamic disease. ΚΠ 1829 W. Stokes Path. Observ. in Westm. Rev. (1830) Jan. 308 On account of this debility being an essential character of typhoid fevers, I denominated them adynamic.] 1834 S. Cooper Good's Study Med. (ed. 4) IV. 272 Dr. Stoker..has divided dropsies into two kinds, dynamic and adynamic. 1855 J. R. Reynolds Diagnosis Dis. Brain ix The simple fact of convulsions is proof of dynamic (functional) disease. 1882 Med. Temp. Jrnl. 1 114 A dynamic narcosis of the ultimate fibres of sensation. b. With Hahnemann and his followers: Of the nature of some immaterial or ‘spiritual’ influence. ΚΠ 1881 J. G. Glover in Encycl. Brit. XII. 128/1 [article Homœopathy] Underlying all his [Hahnemann's] system..was the idea that the causes of disease were impalpable, immaterial, spiritual, dynamic. Categories » †c. Attended with a morbid increase of vital action, sthenic. Obsolete. dynamic school: a name given to the Stahlians, or followers of Stahl, as attributing the vital phenomena to the operation of an internal force or power acting for the most part independently of external causes. ( New Sydenham Soc. Lexicon) 6. In the Kantian philosophy: Relating to the reason of existence of an object of experience. dynamic relations, the relations between objects as forming parts of one connected experience: viz. the relations of substance and accident, of cause and effect, and of substances acting upon each other. dynamic category, a category that expresses one of the dynamic relations. dynamic synthesis, a synthesis which is guided by the dynamic categories. 7. Relating to the existence or action of some force or forces; applied esp. to a theory that accounts for matter, or for mind, as being merely the action of forces: see dynamism n. 1. dynamic theory of Kant, a theory according to which matter was conceived to be constituted by two antagonistic principles of attraction and repulsion. ΚΠ 1817 S. T. Coleridge Biographia Literaria I. ix. 150 We had both equal obligations to the polar logic and dynamic philosophy of Giordano Bruno. 8. Music. Of, pertaining to, or indicating the volume of sound from a musical instrument or in a musical performance. Also transferred. ΚΠ 1893–7 J. S. Shedlock tr. K. W. J. H. Riemann Dict. Music 226/1 The natural dynamic shading of a musical phrase is therefore crescendo..and diminuendo... Dynamic and agogic shadings must be used with economy. 1931 G. Jacob Orchestral Technique iii. 29 It is excellent as a bass-strengthener, however, in dynamic ranges of mf and upwards. 1941 B.B.C. Gloss. Broadcasting Terms 10 Dynamic range, range of intensities within which the volume of a programme fluctuates. 1948 Penguin Music Mag. June 129 Fearless attack, great volume, and subtle dynamic changes. B. n. 1. = dynamics n. ΘΚΠ the world > movement > [noun] > laws of motion > study of dynamics1788 kinematics1840 kinetics1864 dynamic1873 kinetic1873 the world > matter > physics > mechanics > dynamics > [noun] dynamics1788 dynamic1873 1873 W. K. Clifford Syllabus Lect. in Math. Papers (1882) 516 The science which teaches under what circumstances particular motions take place..is called Dynamic..It is divided into two parts, Static..and Kinetic. 1878 W. K. Clifford (title) Elements of Dynamic: an Introduction to the Study of Motion and Rest in Solid and Fluid Bodies. 2. = Dynamic theory: see A. 7. ΚΠ 1884 B. Bosanquet et al. tr. H. Lotze Metaphysic 305 As Kant does in the course of his ‘Proof’ of this ‘Precept No. 1’ of his ‘Dynamic’. 3. Energizing or motive force. ΘΚΠ the world > action or operation > manner of action > vigour or energy > [noun] > vigour or liveliness > imparting vigour or liveliness > one who or that which actative1605 fillip1699 energizer1804 flip1881 dynamic1894 pepper-up1934 pepper-upper1934 1894 H. Drummond Lowell Lect. Ascent of Man 270 The Struggle for Life, as life's dynamic, can never wholly cease. 1896 Advance (Chicago) 16 July 80/1 There is lack of dynamic. There is lack of direct soul-changing power. 4. Music. = dynamics n. 3. ΘΚΠ the world > physical sensation > hearing and noise > thing heard > [noun] > sound > quality of sound > volume > range of dynamics1883 dynamic range1917 dynamic1959 1884 H. Riemann (title) Musikalische Dynamik und Agogik.] 1959 D. Cooke Lang. Music iii. 159 The minor system, soft dynamic, and slow tempo. Compounds dynamic braking n. = electric braking n. at electric adj. and n. Compounds 1b. ΚΠ 1930 Engineering 24 Jan. 105/1 Driven by two 100 h.p. mill-type motors..equipped with solenoid and dynamic braking. 1950 Engineering 22 Dec. 528/2 Slip-ring induction motors with dynamic braking. dynamic equator n. see quot. 1883. ΚΠ 1883 Encycl. Brit. XVI. 165/1 The line connecting all the points where the magnetic intensity is least is called the dynamic equator. dynamic metamorphism n. (dynamical metamorphism) Geology metamorphism produced by mechanical forces. ΚΠ 1893 Jrnl. Geol. (Chicago) 1 854 The dynamic metamorphism of the eruptive rocks occurring in it. 1965 A. Holmes Princ. Physical Geol. (rev. ed.) viii. 170 Since the main process is dynamic, slate is said to be a product of dynamic metamorphism. dynamic pressure n. the pressure in a fluid that is due to its motion. ΚΠ 1919 A. B. Eason Flow & Measurem. Air & Gases ix. 163 Threlfall..mentions tests made upon a Pitot tube in which..there was a large suction effect, and..the difference between the static and dynamic pressures was of the form H = k(u)ⁿ, where n was greater than 2. 1949 O. G. Sutton Sci. of Flight ii. 36 The dynamic pressure of the flow..is the pressure felt on the nose of a body at the point where the impinging stream is actually brought to rest. 1970 A. C. Kermode Flight without Formulae (ed. 4) 43 A fluid can exert pressure for two reasons: first because of its movement... The pressure due to movement we will call dynamic pressure. Draft additions 1993 dynamic range n. a range of acceptable or possible volumes of sound, esp. the range of volumes occurring in the course of a piece of music, performance, programme, etc.; spec. the ratio of the largest to the smallest intensity of sound that can be reliably transmitted or reproduced by a particular sound system. ΘΚΠ the world > physical sensation > hearing and noise > thing heard > [noun] > sound > quality of sound > volume > range of dynamics1883 dynamic range1917 dynamic1959 1917 G. B. Shaw in Nation 28 July 430/1 Sir Thomas Beecham..seems to have no conception of the dynamic range of Mozart's effects. 1949 L. L. Beranek Acoustic Measurements xiv. 637 The dynamic range of a microphone is the range of levels of input signals which can usefully be transduced by the instrument. It is..limited at high levels by the amount of distortion which can be tolerated in the transduced signal. 1967 db Nov. 16/2 This technique can improve the dynamic range of the recorder up to 6 dB with attendant low distortion. 1980 Audio Jan. 52/1 Even these fine recordings are too often marred by the presence of record surface noise and restrictions on the dynamic range that could be captured on and retrieved from a vinyl disc. Draft additions July 2010 dynamic HTML n. Computing HTML enhanced by other web technologies (such as a scripting language like Javascript) used to enable a web page to support changing content or interactive capabilities in such a way that page changes are displayed automatically by the browser and do not need to be individually requested from the web server; abbreviated DHTML. ΘΚΠ society > computing and information technology > data > [noun] > format format1955 SGML1983 Standard Generalized Markup Language1983 Rich Text Format1986 RTF1986 CD-R1988 rich text1988 Hypertext Markup Language1992 PDF1992 HTML1993 dynamic HTML1995 Extensible Markup Language1996 XML1996 MathML1997 1995 Re: Registering Users/Passwords in comp.infosystems.www.providers (Usenet newsgroup) 20 Apr. We are currently putting together some demo software and C++ class libraries to do dynamic HTML and simple database access. 2000 Red Herring Mar. 100/2 Written in Dynamic HTML, it's a somewhat-capable Web-based spreadsheet that runs locally on your machine without relying on a high-bandwidth connection. 2009 S. St. Laurent & E. Dumbill Learning Rails xvi. 269 Most of what Ajax does today is what used to be called Dynamic HTML, or DHTML. DHTML built on regular HTML by adding JavaScript code that could change the underlying HTML. Draft additions June 2004 dynamic pricing n. [ < dynamic adj. + pricing n., after Swedish dynamiska prisbildning (G. Myrdal Prisbildningsproblemet och föränderligheten (1927) i. 1)] Business the varying of a product's price to reflect changing market conditions; esp. the charging of higher prices at times of greater demand, in more affluent areas, etc. ΚΠ 1929 E. Lindahl in Econ. Jrnl. 39 89 There are two quite distinct problems which are caused by the dynamic conditions of the economic life, depending on the point of view from which dynamic pricing is analysed. 1964 A. Isaacs & R. E. Slesinger Business, Govt. & Public Policy 178 Consumer free choice, dynamic pricing, and freedom to contract are fundamentals of the enterprise approach. 2000 Washington Post 27 Sept. a1/1 It was the first major Web test of a strategy called ‘dynamic pricing’, which gauges a shopper's desire, measures his means and then charges accordingly. Draft additions July 2010 Computing. That changes or that can be changed while a program or operating system is running; that can be specified or performed at run time, rather than in advance. Cf. static adj. 10c. ΚΠ 1978 J. M. Sakoda et al. in D. E. Bailey Computer Sci. in Social & Behavioral Sci. Education vii. 88 It is the lack of dynamic storage allocation that is at the base of artificial restrictions of table sizes, since fortran arrays must be allocated at the time a program is written. 1989 PC World Oct. 100/1 The program supports dynamic links to cells or ranges. 2007 R. Love Linux Syst. Programming 245 You need dynamic memory when the amount of memory that you will need, or how long you might need it, varies, and is not known before the program runs. Draft additions December 2012 dynamic RAM n. Computing = DRAM n. at D n. Additions; cf. static RAM n. at static n. and adj. Compounds. ΘΚΠ society > computing and information technology > hardware > [noun] > primary storage or main memory > random access random access1950 random-access memory1953 RAM1957 dynamic RAM1975 DRAM1981 1975 Computerworld 26 Feb. 36/2 Read-write memories include a 4K core module, a 1K static RAM and a 4K dynamic RAM. 1989 PC Mag. (U.K. ed.) May 24/4 The computer is equipped with 2Mbyte of dynamic RAM as standard. 1996 H. G. Cragon Memory Syst. & Pipelined Processors i. 2 Information on the reduction of access times of dynamic RAMS and static RAMS. 2012 Internat. Herald Tribune (Nexis) 14 Jan. (Finance section) 9 STT-RAM..is viewed by some as a future competitor for DRAM, or dynamic RAM. This entry has not yet been fully updated (first published 1897; most recently modified version published online March 2022). < adj.n.1817
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