parallaxn.

Brit.

/ˈparəlaks/, U.S.

/ˈpɛrəˌlæks/

Forms: 1500s paralex, 1500s–1600s paralax, 1500s– parallax, 1600s paralaxe, 1600s parallaxe.

Origin: Perhaps of multiple origins. Partly a borrowing from Greek. Perhaps partly a borrowing from French. Perhaps partly a borrowing from Latin. Etymons: French parallaxe; Latin parallaxis; Greek παράλλαξις.

Etymology: Partly < Middle French, French parallaxe (1557 in astronomy) or post-classical Latin parallaxis (1574 in astronomy; 1612, 1686 in British sources), and partly (in sense 2) < their etymon ancient Greek παράλλαξις change, alteration, alternation, in Hellenistic Greek also in the specific astronomical use < the stem of παραλλάσσειν to alter, alternate, in Hellenistic Greek also in the specific astronomical use ( < παρα- para- prefix¹ + ἀλλάσσειν to change, exchange (see allactite n.); compare παραλλάξ alternately) + -σις -sis suffix.On plural forms see note at parallaxis n.

a. Difference or change in the apparent position or direction of an object as seen from two different points; (Astronomy) such a difference or change in the position of a celestial object as seen from different points on the earth's surface or from opposite points in the earth's orbit around the sun. Also: (half of) the angular amount of such a difference or change; (Astronomy) the angle subtended at a celestial object by the radius of the earth's orbit, giving a measure of its distance from the earth; any of various similar measures of distance calculated by methods incorporating the motion of the sun relative to the local region of the galaxy, the proper motion of the observed body, the motions of a cluster of bodies having similar distances and speeds, etc.

ΘΚΠ

the world > space > distance > [noun] > angular distance

parallaxis1663

parallax1812

?1574 W. Bourne Regiment for Sea xv. sig. L.iij^v The paralex of the Moone, whiche the semidiametre of the earth doth cause, by the neernesse of the Moone vnto the earth.

1580 W. Bourne Regiment for Sea (new ed.) Introd. f. 6 Paralax is when that the Moone..in some partes of the Skyes..shall seme nearer or farther vnto those starres..which reason groweth by the Cimideameter of the earth.

1599 E. Wright Certaine Errors Navigation sig. N3^v Neglecting the paralax or eccentricitie of the eye.

1612 J. Selden in M. Drayton Poly-olbion xiv. Illustr. 235 Those learned Mathematicians, by omitting of Paralax and Refractions, deceiued themselues and posterity.

1665 Philos. Trans. (Royal Soc.) 1 106 He hath deduced the Horizontal Parallax of this very Comet.

1708 W. Whiston New Theory of Earth (ed. 2) i. 32 The fix'd Stars..till very lately..were thought subject to no parallax at all.

a1711 T. Ken Wks. (1721) I. 44 I saw it moving in a Sphear so high, Scarce any Parallax I cou'd descry.

1761 Philos. Trans. 1760 (Royal Soc.) 51 889 (heading) A proposal for discovering the annual parallax of Sirius.

1812 R. Woodhouse Elem. Treat. Astron. xii. 98 The parallax of Mars was found to be about 23 seconds.

1881 Nature 24 Nov. 91/1 In these thermometers..no provision is made for avoiding parallax or personal equation.

1914 A. S. Eddington Stellar Movements & Struct. Universe x. 204 The mean parallactic motion, or secular parallax, provides the necessary means of determining the dependence of parallax on magnitude alone.

1950 J. Clendinning Princ. Surv. x. 222 In practice, the full stereoscopic parallax is not very easy to measure, and it is much simpler to measure differences of parallax between points.

1992 S. P. Maran Astron. & Astrophysics Encycl. 731/2 A correction must be applied to transform those relative parallaxes to true or ‘absolute parallaxes’.

b. figurative and in figurative contexts. Distortion; the fact of seeing wrongly or in a distorted way.

ΘΚΠ

the world > physical sensation > sight and vision > [noun] > parallax

parallax1595

parallaxisa1682

1595 J. Davis Seamans Secrets i. sig. C2 To amend the parallax or false shadowe of your sight.

1599 S. Daniel Musophilus 606 Vndeceiued with the Paralax Of a mistaking eye of passion.

1613 W. Browne Britannia's Pastorals iii. i, in Whole Wks. (1868) 143 My griefes admitt noe parallax; they goe, Like to the fixed starres, in such a spheare, Soe hye from meaner woes and comon care.

1870 F. M. Müller Sci. Relig. (1873) 43 Unless we make allowance for this mental parallax [between material and spiritual].

1892 Nation (N.Y.) 7 Apr. 262/3 The sort of parallax which exhibits the light of Whitman's fame at so different an angle in his own country and in England.

1949 Amer. Hist. Rev. 54 651 In several sections of the volume with whose subject matter the reviewer feels particularly familiar there is thus a sustained effect as of parallax.

1973 Speculum 48 154 This accounts for what some critics have termed the Reynardian parallax.

1999 Amer. Hist. Rev. 104 58 For genealogical criticism indeed entails the parallax Foster requires of ‘ethnographic art’.

†2. A change, an alteration. Obsolete. rare.

ΘΚΠ

the world > time > change > [noun]

wendingeOE

changing?c1225

stirringa1240

wrixlinga1240

changec1325

variancec1340

transmutationc1380

varyingc1380

whileness1382

translationc1384

alterationa1398

mutationa1398

removinga1425

revolutiona1425

shiftingc1440

changementc1450

muance1480

commutation1509

altry1527

transition1545

turning1548

novation1549

immutation?c1550

alterance1559

alienation1562

turn?1567

vicissitude1603

refraction1614

fermentationa1661

diabasis1672

parallax1677

motion1678

aliation1775

transience1946

1677 T. Gale Court of Gentiles: Pt. IV iv. 258 The Sun although it is not so variable as the Moon, yet..it has its παραλλαγας or παραλαξεις, Paralaxes and Changes: it appears otherwise at rising, otherwise at noon, otherwise at setting.

3. Photography. A defect in a photographic image caused by differences in the positions of parts of the camera; spec. incorrect framing of an image due to the differing positions of the viewfinder and the lens.

ΚΠ

1935 Discovery July 189/1 Iceland spar..beam splitter..entirely free from parallax. This system may be employed..to obtain three-colour negatives.

1936 Sci. Monthly 43 235/1 At the proper moment the shutter was tripped and the image secured on the plate was almost the same as that seen by the eye. The small amount of parallax could be compensated for after some experience.

1940 A. L. M. Sowerby Wall's Dict. Photogr. (ed. 15) 484 The term ‘parallax’ has a special photographic meaning. It is applied to indicate the difference between the view seen in a finder and that which will actually be photographed by the lens.

1969 Focal Encycl. Photogr. (rev. ed.) 1632/2 There are various ways of compensating for the framing error due to the finder parallax (the difference in viewpoint between the viewfinder and the camera lens).

1992 Camera & Darkroom Feb. 56/2 The coupled range-viewfinder is a nice feature that helps indicate what the lens actually sees by automatically adjusting for parallax.

Compounds

parallax error n. an error caused by parallax; spec. error in reading an instrument as a result of the scale and the indicator not being precisely coincident.

ΘΚΠ

the world > relative properties > measurement > measuring instrument > [noun] > graduated instruments > indication on a measuring instrument > specific false reading

parallax error1890

1890 Proc. Royal Soc. 1889–90 47 236 A lens..is moved about till the image of the last graduation on the stem of the thermometer reflected in the thread of mercury is seen to be covered by the graduation. There is then no parallax error.

1967 Electronics 6 Mar. 117/2 With analog instruments..operator and parallax errors, meter movement wear and aging often reduce their nominal accuracies.

2001 What Digital Camera Aug. 32/1 Objects that had appeared central in the viewfinder shifted over to the right when the output is displayed (a phenomenon known as parallax error).

parallax scrolling n. Computing (in computer games) the scrolling of different segments of a background image at different rates in order to create an illusion of changing perspective.

ΚΠ

1990 CU Amiga Apr. 5/4 Violent, frenzied, with parallax scrolling and big, big graphics, AMC should be liberating a sector near you soon.

2001 Business Wire (Nexis) 16 May The game features crisp graphics and parallax scrolling bringing the game to life while delivering simple yet highly addictive gameplay.

This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).

单词	parallax
释义	parallaxn. Brit. /ˈparəlaks/, U.S. /ˈpɛrəˌlæks/ Forms: 1500s paralex, 1500s–1600s paralax, 1500s– parallax, 1600s paralaxe, 1600s parallaxe. Origin: Perhaps of multiple origins. Partly a borrowing from Greek. Perhaps partly a borrowing from French. Perhaps partly a borrowing from Latin. Etymons: French parallaxe; Latin parallaxis; Greek παράλλαξις. Etymology: Partly < Middle French, French parallaxe (1557 in astronomy) or post-classical Latin parallaxis (1574 in astronomy; 1612, 1686 in British sources), and partly (in sense 2) < their etymon ancient Greek παράλλαξις change, alteration, alternation, in Hellenistic Greek also in the specific astronomical use < the stem of παραλλάσσειν to alter, alternate, in Hellenistic Greek also in the specific astronomical use ( < παρα- para- prefix¹ + ἀλλάσσειν to change, exchange (see allactite n.); compare παραλλάξ alternately) + -σις -sis suffix.On plural forms see note at parallaxis n. 1. a. Difference or change in the apparent position or direction of an object as seen from two different points; (Astronomy) such a difference or change in the position of a celestial object as seen from different points on the earth's surface or from opposite points in the earth's orbit around the sun. Also: (half of) the angular amount of such a difference or change; (Astronomy) the angle subtended at a celestial object by the radius of the earth's orbit, giving a measure of its distance from the earth; any of various similar measures of distance calculated by methods incorporating the motion of the sun relative to the local region of the galaxy, the proper motion of the observed body, the motions of a cluster of bodies having similar distances and speeds, etc. ΘΚΠ the world > space > distance > [noun] > angular distance parallaxis1663 parallax1812 ?1574 W. Bourne Regiment for Sea xv. sig. L.iij^v The paralex of the Moone, whiche the semidiametre of the earth doth cause, by the neernesse of the Moone vnto the earth. 1580 W. Bourne Regiment for Sea (new ed.) Introd. f. 6 Paralax is when that the Moone..in some partes of the Skyes..shall seme nearer or farther vnto those starres..which reason groweth by the Cimideameter of the earth. 1599 E. Wright Certaine Errors Navigation sig. N3^v Neglecting the paralax or eccentricitie of the eye. 1612 J. Selden in M. Drayton Poly-olbion xiv. Illustr. 235 Those learned Mathematicians, by omitting of Paralax and Refractions, deceiued themselues and posterity. 1665 Philos. Trans. (Royal Soc.) 1 106 He hath deduced the Horizontal Parallax of this very Comet. 1708 W. Whiston New Theory of Earth (ed. 2) i. 32 The fix'd Stars..till very lately..were thought subject to no parallax at all. a1711 T. Ken Wks. (1721) I. 44 I saw it moving in a Sphear so high, Scarce any Parallax I cou'd descry. 1761 Philos. Trans. 1760 (Royal Soc.) 51 889 (heading) A proposal for discovering the annual parallax of Sirius. 1812 R. Woodhouse Elem. Treat. Astron. xii. 98 The parallax of Mars was found to be about 23 seconds. 1881 Nature 24 Nov. 91/1 In these thermometers..no provision is made for avoiding parallax or personal equation. 1914 A. S. Eddington Stellar Movements & Struct. Universe x. 204 The mean parallactic motion, or secular parallax, provides the necessary means of determining the dependence of parallax on magnitude alone. 1950 J. Clendinning Princ. Surv. x. 222 In practice, the full stereoscopic parallax is not very easy to measure, and it is much simpler to measure differences of parallax between points. 1992 S. P. Maran Astron. & Astrophysics Encycl. 731/2 A correction must be applied to transform those relative parallaxes to true or ‘absolute parallaxes’. b. figurative and in figurative contexts. Distortion; the fact of seeing wrongly or in a distorted way. ΘΚΠ the world > physical sensation > sight and vision > [noun] > parallax parallax1595 parallaxisa1682 1595 J. Davis Seamans Secrets i. sig. C2 To amend the parallax or false shadowe of your sight. 1599 S. Daniel Musophilus 606 Vndeceiued with the Paralax Of a mistaking eye of passion. 1613 W. Browne Britannia's Pastorals iii. i, in Whole Wks. (1868) 143 My griefes admitt noe parallax; they goe, Like to the fixed starres, in such a spheare, Soe hye from meaner woes and comon care. 1870 F. M. Müller Sci. Relig. (1873) 43 Unless we make allowance for this mental parallax [between material and spiritual]. 1892 Nation (N.Y.) 7 Apr. 262/3 The sort of parallax which exhibits the light of Whitman's fame at so different an angle in his own country and in England. 1949 Amer. Hist. Rev. 54 651 In several sections of the volume with whose subject matter the reviewer feels particularly familiar there is thus a sustained effect as of parallax. 1973 Speculum 48 154 This accounts for what some critics have termed the Reynardian parallax. 1999 Amer. Hist. Rev. 104 58 For genealogical criticism indeed entails the parallax Foster requires of ‘ethnographic art’. †2. A change, an alteration. Obsolete. rare. ΘΚΠ the world > time > change > [noun] wendingeOE changing?c1225 stirringa1240 wrixlinga1240 changec1325 variancec1340 transmutationc1380 varyingc1380 whileness1382 translationc1384 alterationa1398 mutationa1398 removinga1425 revolutiona1425 shiftingc1440 changementc1450 muance1480 commutation1509 altry1527 transition1545 turning1548 novation1549 immutation?c1550 alterance1559 alienation1562 turn?1567 vicissitude1603 refraction1614 fermentationa1661 diabasis1672 parallax1677 motion1678 aliation1775 transience1946 1677 T. Gale Court of Gentiles: Pt. IV iv. 258 The Sun although it is not so variable as the Moon, yet..it has its παραλλαγας or παραλαξεις, Paralaxes and Changes: it appears otherwise at rising, otherwise at noon, otherwise at setting. 3. Photography. A defect in a photographic image caused by differences in the positions of parts of the camera; spec. incorrect framing of an image due to the differing positions of the viewfinder and the lens. ΚΠ 1935 Discovery July 189/1 Iceland spar..beam splitter..entirely free from parallax. This system may be employed..to obtain three-colour negatives. 1936 Sci. Monthly 43 235/1 At the proper moment the shutter was tripped and the image secured on the plate was almost the same as that seen by the eye. The small amount of parallax could be compensated for after some experience. 1940 A. L. M. Sowerby Wall's Dict. Photogr. (ed. 15) 484 The term ‘parallax’ has a special photographic meaning. It is applied to indicate the difference between the view seen in a finder and that which will actually be photographed by the lens. 1969 Focal Encycl. Photogr. (rev. ed.) 1632/2 There are various ways of compensating for the framing error due to the finder parallax (the difference in viewpoint between the viewfinder and the camera lens). 1992 Camera & Darkroom Feb. 56/2 The coupled range-viewfinder is a nice feature that helps indicate what the lens actually sees by automatically adjusting for parallax. Compounds parallax error n. an error caused by parallax; spec. error in reading an instrument as a result of the scale and the indicator not being precisely coincident. ΘΚΠ the world > relative properties > measurement > measuring instrument > [noun] > graduated instruments > indication on a measuring instrument > specific false reading parallax error1890 1890 Proc. Royal Soc. 1889–90 47 236 A lens..is moved about till the image of the last graduation on the stem of the thermometer reflected in the thread of mercury is seen to be covered by the graduation. There is then no parallax error. 1967 Electronics 6 Mar. 117/2 With analog instruments..operator and parallax errors, meter movement wear and aging often reduce their nominal accuracies. 2001 What Digital Camera Aug. 32/1 Objects that had appeared central in the viewfinder shifted over to the right when the output is displayed (a phenomenon known as parallax error). parallax scrolling n. Computing (in computer games) the scrolling of different segments of a background image at different rates in order to create an illusion of changing perspective. ΚΠ 1990 CU Amiga Apr. 5/4 Violent, frenzied, with parallax scrolling and big, big graphics, AMC should be liberating a sector near you soon. 2001 Business Wire (Nexis) 16 May The game features crisp graphics and parallax scrolling bringing the game to life while delivering simple yet highly addictive gameplay. This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022). < n.?1574
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