geometrical planen.
/ˌdʒiːəˌmɛtrᵻkl ˈpleɪn/, /dʒɪəˌmɛtrᵻkl ˈpleɪn/, U.S. /ˌdʒiəˌmɛtrək(ə)l ˈpleɪn/ 1. = plane n.3 1a.
ΘΚΠ
the world > physical sensation > sight and vision > [noun] > perspective > plane
geometrical plane1676
horizontal plane1705
1676 T. Binning Light to Art of Gunnery v. 9 25, 36, 49, are three Square Numbers, for they are Products of the Multiplication of two equal Numbers... For the Products may be understood by their Unites in a Plane, of such kind as shall represent the form and figure of a Geometrical Plane, as you see here under.
1752 Philos. Trans. 1749–50 (Royal Soc.) 46 265 'Tis by the Force of Salts that liquid Bodies are thrown into all the geometrical Planes, Angles, and more compounded Shapes.
1849 Edinb. Med. & Surg. Jrnl. 72 423 A crystal of quartz or amethyst, with its geometrical planes and angles.
1913 Pop. Sci. Oct. 384 For illustration, define his world as the geometrical plane formed by the two lines xx′, yy′ intersecting each other at right angles.
2007 D. C. Catling & C. Leovy in L.-A. McFadden et al. Encycl. Solar Syst. (ed. 2) xv. 313/2 The ecliptic, which is the geometrical plane that contains the Earth's orbit.
2. Perspective = ground-plane n. at ground n. Compounds 2a. Now rare.
ΘΚΠ
society > leisure > the arts > visual arts > painting and drawing > perspective > [noun] > planes, lines, or points
horizontal plane1638
eye-pointa1650
table1670
principal point1671
plan1678
geometrical plane1695
terrestrial line1704
vertical plane1704
baseline1724
station line1724
middle ground1753
picture plane1771
middle distance1778
primitive plane1798
seat1815
mid-distance1828
ground-plane1833
station point1859
mid-ground1864
no-sky line1927
1695 J. Dryden tr. C. A. Du Fresnoy De Arte Graphica 19 Bodies are not always represented according to the Geometrical Plane [L. Geometralem Mensuram], but such as they appear to the Sight.
?1785 Artist's Assistant in Study Mech. Sci. (new ed.) 28 A geometrical plane is a plane parallel to the horizon, whereon the object to be delineated is supposed to be placed.
1856 A. E. Penley Elem. Perspective (ed. 7) 46 The height of the pillar must..be represented by a vertical straight line raised from the centre of the geometrical plane.
1911 Encycl. Brit. XXI. 257/2 The lowest plane which contains points that are to appear in the picture is..called the ground plane, or sometimes the geometrical plane.
This entry has been updated (OED Third Edition, March 2012; most recently modified version published online June 2022).
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n.1676