cone

cone
n.
one of the two types of light-sensitive cells in the retina of the eye (compare rod). The human retina contains 6–7 million cones; they function best in bright light and are essential for acute vision (receiving a sharp accurate image). The area of the retina called the fovea contains the greatest concentration of cones. Cones can also distinguish colours. It is thought that there are three types of cone, each sensitive to the wavelength of a different primary colour – red, green, or blue. Other colours are seen as combinations of these three primary colours.

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  • cône — cône …   Dictionnaire des rimes

  • cône — [ kon ] n. m. • 1552; lat. conus, gr. kônos 1 ♦ Math. Surface réglée dont les génératrices passent par un point fixe, le sommet. Angle au sommet du cône (angle Ŝ du triangle) :intersection du cône avec le plan passant par l axe. Angle solide du… …   Encyclopédie Universelle

  • Cone — Cône Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom …   Wikipédia en Français

  • Cone — (k[=o]n?), n. [L. conus cone (in sense 1), Gr. kw^nos; akin to Skr. [,c]ana whetstone, L. cuneus wedge, and prob. to E. hone. See {Hone}, n.] 1. (Geom.) A solid of the form described by the revolution of a right angled triangle about one of the… …   The Collaborative International Dictionary of English

  • Coné — es un personaje de la tira cómica Condorito creada por Pepo. Apareció en la edición 22 de Condorito, en 1967. Es el sobrino de Condorito y vive como él en la ciudad ficticia de Pelotillehue. En una historieta revela que tiene 8 años recién… …   Wikipedia Español

  • cone — [ koun ] noun count * 1. ) an object with a circular base that rises to a point. Something in the shape of a cone is conical: a large building shaped like a cone a tower with a cone shaped roof 2. ) a cone shape that you put ice cream in and eat …   Usage of the words and phrases in modern English

  • CONE — CONE, U.S. commercial and philanthropic family. HERMAN CONE (1828–97), the father of 13 children, emigrated from Bavaria to the U.S. in 1845 and ultimately established a successful wholesale grocery business in Baltimore. His two eldest sons,… …   Encyclopedia of Judaism

  • Cone — ist der Name von: Personen: Fred P. Cone (1871–1948), amerikanischer Politiker Mac Cone (*1952), kanadischer Springreiter Schwestern Cone (1894–1929), Claribel und Eta Cone, amerikanische Gesellschaftsdamen und Kunstsammlerinnen Orten: Cone… …   Deutsch Wikipedia

  • cone — CONE. s. m. Terme de Mathématique. Pyramide ronde, corps solide, dont la base est un cercle, et qui se termine en pointe. Les pains de sucre sont faits en cône. f♛/b] On appelle Cône droit, Celui dont l axe est perpendiculaire à la base; et Cône… …   Dictionnaire de l'Académie Française 1798

  • cone — [kōn] n. [ME < L conus < Gr kōnos, a wedge, peak, cone < IE base kō(n) , to sharpen > HONE1, L cos] 1. a) a flat based, single pointed solid formed by a rotating straight line that traces out a closed curved base from a fixed vertex… …   English World dictionary

  • Cone — (k[=o]n), v. t. To render cone shaped; to bevfl like whe circwlar segoent of a cone; as, to cone the tires of car wheels. [1913 Webster] …   The Collaborative International Dictionary of English

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