planoconvexadj.n.

Brit.

/ˌpleɪnəʊˈkɒnvɛks/, U.S.

/ˌpleɪnoʊˈkɑnˌvɛks/

Origin: Formed within English, by compounding. Etymons: plano- comb. form¹, convex adj.

Etymology: < plano- comb. form¹ + convex adj. Compare French plano-convexe (1666). In sense 2 after post-classical Latin plano-convexus (1744 in the passage translated in quot. 1843 at sense 2). Compare earlier planoconcave adj.

a. Of a lens, part of an animal or plant, etc.: having one surface plane and the opposite one convex. Also occasionally as n.: a planoconvex lens.

ΘΚΠ

the world > physical sensation > sight and vision > optical instruments > lens > [adjective] > types of lenses

convex?a1560

planoconvex1665

concavo-convex1677

convexo-concave1693

strong1732

aplanatic1799

periscopic1803

omphaloptic1819

polyzonal1823

shallow1837

first-order1846

periscopical1846

orthoscopic1853

rectilinear1874

overcorrected1875

sphero-cylindrical1881

wide-aperture1882

afocal1887

apochromatic1887

anastigmatic1890

telecentric1892

photovisual1899

aspherical1922

aspheric1923

multifocal1928

plano1944

demagnifying1959

the world > space > shape > curvature > curved surface > [adjective] > convex > plane on one side

planoconvex1665

plane-convex1668

1665 R. Hooke Micrographia Pref. sig. F2 Into the bigger end I fixt also with wax a pretty large plano Convex Glass.

1704 I. Newton Opticks ii. 8 Being uncertain whether the Plano-convex Glass was truly plain..I repeated the Experiment.

1742 Philos. Trans. 1739–40 (Royal Soc.) 41 336 The small plano-convex Eye-glass O must always have one common Focus with the Telescope.

1810 D. Stewart Philos. Ess. ii. i. vii. 330 In wooded scenes, the plano-convex mirrour, which was Mr. Gray's companion in all his tours, has a pleasing effect.

1830 J. Lindley Introd. Nat. Syst. Bot. 75 Cotyledons plano-convex.

1879 Cassell's Techn. Educator (new ed.) IV. 258/1 The condensers in ordinary use are, The common ‘bull's-eye’ or plano-convex.

1904 H. H. Hume Citrus Fruits & their Culture xvi. 86 Seeds present, about nine in number, plano-convex.

1952 V. G. Childe New Light on Most Anc. East (ed. 4) viii. 148 The rectangular tile-shaped bricks..were replaced by small plano-convex bricks, flat on one face but cushion-shaped on the other.

1998 J. L. Heilbron Geom. Civilized vi. 284 The general idea may be illustrated by a plano-convex lens, made from one spherical shell, with its plane face turned toward the sun.

†b. spec. Of a crystal: having some faces plane and others convex. Obsolete. rare.

ΘΚΠ

the world > matter > chemistry > crystallography (general) > crystal (general) > structures and forms > [adjective] > miscellaneous other

primitive1807

subtractive1807

based1810

emarginated1816

planoconvex1816

primary1823

hemisystematic1878

face-centred1913

body-centred1918

mosaic1934

1816 R. Jameson Treat. External Characters Minerals (ed. 2) 203 Plano-convex.., when the faces are partly straight and partly uneven, as in the diamond.

2. Botany and Zoology. Having a flattened convex form. Now rare.

ΘΚΠ

the world > space > shape > curvature > curved surface > [adjective] > convex > of flattened convex form

planoconvex1843

1843 J. J. G. Wilkinson tr. E. Swedenborg Animal Kingdom I. i. 21 Its [sc. the tongue's] upper surface is plano-convex.

1845 J. Lindley School Bot. (1858) vi. 83 Receptacle plano-convex, paleaceous.

1908 M. E. Hard Mushroom 322 Stropharia æruginosa... The pileus is fleshy, plano-convex, sub-umbonate, clothed with a green evanescent slime.

This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).

单词	planoconvex
释义	planoconvexadj.n. Brit. /ˌpleɪnəʊˈkɒnvɛks/, U.S. /ˌpleɪnoʊˈkɑnˌvɛks/ Origin: Formed within English, by compounding. Etymons: plano- comb. form¹, convex adj. Etymology: < plano- comb. form¹ + convex adj. Compare French plano-convexe (1666). In sense 2 after post-classical Latin plano-convexus (1744 in the passage translated in quot. 1843 at sense 2). Compare earlier planoconcave adj. 1. a. Of a lens, part of an animal or plant, etc.: having one surface plane and the opposite one convex. Also occasionally as n.: a planoconvex lens. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > lens > [adjective] > types of lenses convex?a1560 planoconvex1665 concavo-convex1677 convexo-concave1693 strong1732 aplanatic1799 periscopic1803 omphaloptic1819 polyzonal1823 shallow1837 first-order1846 periscopical1846 orthoscopic1853 rectilinear1874 overcorrected1875 sphero-cylindrical1881 wide-aperture1882 afocal1887 apochromatic1887 anastigmatic1890 telecentric1892 photovisual1899 aspherical1922 aspheric1923 multifocal1928 plano1944 demagnifying1959 the world > space > shape > curvature > curved surface > [adjective] > convex > plane on one side planoconvex1665 plane-convex1668 1665 R. Hooke Micrographia Pref. sig. F2 Into the bigger end I fixt also with wax a pretty large plano Convex Glass. 1704 I. Newton Opticks ii. 8 Being uncertain whether the Plano-convex Glass was truly plain..I repeated the Experiment. 1742 Philos. Trans. 1739–40 (Royal Soc.) 41 336 The small plano-convex Eye-glass O must always have one common Focus with the Telescope. 1810 D. Stewart Philos. Ess. ii. i. vii. 330 In wooded scenes, the plano-convex mirrour, which was Mr. Gray's companion in all his tours, has a pleasing effect. 1830 J. Lindley Introd. Nat. Syst. Bot. 75 Cotyledons plano-convex. 1879 Cassell's Techn. Educator (new ed.) IV. 258/1 The condensers in ordinary use are, The common ‘bull's-eye’ or plano-convex. 1904 H. H. Hume Citrus Fruits & their Culture xvi. 86 Seeds present, about nine in number, plano-convex. 1952 V. G. Childe New Light on Most Anc. East (ed. 4) viii. 148 The rectangular tile-shaped bricks..were replaced by small plano-convex bricks, flat on one face but cushion-shaped on the other. 1998 J. L. Heilbron Geom. Civilized vi. 284 The general idea may be illustrated by a plano-convex lens, made from one spherical shell, with its plane face turned toward the sun. †b. spec. Of a crystal: having some faces plane and others convex. Obsolete. rare. ΘΚΠ the world > matter > chemistry > crystallography (general) > crystal (general) > structures and forms > [adjective] > miscellaneous other primitive1807 subtractive1807 based1810 emarginated1816 planoconvex1816 primary1823 hemisystematic1878 face-centred1913 body-centred1918 mosaic1934 1816 R. Jameson Treat. External Characters Minerals (ed. 2) 203 Plano-convex.., when the faces are partly straight and partly uneven, as in the diamond. 2. Botany and Zoology. Having a flattened convex form. Now rare. ΘΚΠ the world > space > shape > curvature > curved surface > [adjective] > convex > of flattened convex form planoconvex1843 1843 J. J. G. Wilkinson tr. E. Swedenborg Animal Kingdom I. i. 21 Its [sc. the tongue's] upper surface is plano-convex. 1845 J. Lindley School Bot. (1858) vi. 83 Receptacle plano-convex, paleaceous. 1908 M. E. Hard Mushroom 322 Stropharia æruginosa... The pileus is fleshy, plano-convex, sub-umbonate, clothed with a green evanescent slime. This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < adj.n.1665
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