Plane
Plane Plane, n. [F. plane, L. plana. See {Plane}, v. & a.] 1. (Geom.) A surface, real or imaginary, in which, if any two points are taken, the straight line which joins them lies wholly in that surface; or a surface, any section of which by a like surface is a straight line; a surface without curvature. [1913 Webster]

2. (Astron.) An ideal surface, conceived as coinciding with, or containing, some designated astronomical line, circle, or other curve; as, the plane of an orbit; the plane of the ecliptic, or of the equator. [1913 Webster]

3. (Mech.) A block or plate having a perfectly flat surface, used as a standard of flatness; a surface plate. [1913 Webster]

4. (Joinery) A tool for smoothing boards or other surfaces of wood, for forming moldings, etc. It consists of a smooth-soled stock, usually of wood, from the under side or face of which projects slightly the steel cutting edge of a chisel, called the iron, which inclines backward, with an apperture in front for the escape of shavings; as, the jack plane; the smoothing plane; the molding plane, etc. [1913 Webster]

{Objective plane} (Surv.), the horizontal plane upon which the object which is to be delineated, or whose place is to be determined, is supposed to stand.

{Perspective plane}. See {Perspective}.

{Plane at infinity} (Geom.), a plane in which points infinitely distant are conceived as situated.

{Plane iron}, the cutting chisel of a joiner's plane.

{Plane of polarization}. (Opt.) See {Polarization}.

{Plane of projection}. (a) The plane on which the projection is made, corresponding to the perspective plane in perspective; -- called also principal plane. (b) (Descriptive Geom.) One of the planes to which points are referred for the purpose of determining their relative position in space.

{Plane of refraction} or {Plane of reflection} (Opt.), the plane in which lie both the incident ray and the refracted or reflected ray. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Synonyms:

### Look at other dictionaries:

• plané — plané …   Dictionnaire des rimes

• plane — [ plan ] n. f. • XIVe; plaine XIIe; réfect., d apr. le v. planer, de l a. fr. plaine, bas lat. plana ♦ Techn. Outil formé d une lame tranchante et de deux poignées, appelé aussi couteau à deux manches, qui sert à aplanir, à dégrossir une surface… …   Encyclopédie Universelle

• plané — plane [ plan ] n. f. • XIVe; plaine XIIe; réfect., d apr. le v. planer, de l a. fr. plaine, bas lat. plana ♦ Techn. Outil formé d une lame tranchante et de deux poignées, appelé aussi couteau à deux manches, qui sert à aplanir, à dégrossir une… …   Encyclopédie Universelle

• Plane — Plane, a. [L. planus: cf. F. plan. See {Plan}, a.] Without elevations or depressions; even; level; flat; lying in, or constituting, a plane; as, a plane surface. [1913 Webster] Note: In science, this word (instead of plain) is almost exclusively… …   The Collaborative International Dictionary of English

• plane — 1. (pla n ) s. m. Nom vulgaire donné à une espèce d érable que les botanistes appellent érable plane, acer platanoides, L. •   Des gazons émaillés l ornaient [une fontaine] tout alentour ; Un plane l ombrageait de son vaste contour, SÉNECÉ… …   Dictionnaire de la Langue Française d'Émile Littré

• plane — UK US /pleɪn/ noun [C] ► an aircraft with wings and one or more engines: a plane for/to/from sth »I ll get the next plane to London. on/in a plane »He s on a plane at the moment, on his way to Chicago. a plane leaves/takes off/lands »The plane… …   Financial and business terms

• plane — plane1 [plān] n. [ME < MFr plasne < L platanus < Gr platanos < platys, broad (see PLATY ): from its broad leaves] any of a genus (Platanus) of trees of the plane tree family having maplelike leaves, spherical dry fruits, and bark that …   English World dictionary

• plane — Ⅰ. plane [1] ► NOUN 1) a flat surface on which a straight line joining any two points would wholly lie. 2) a level of existence or thought. ► ADJECTIVE 1) completely level or flat. 2) relating to two dimensional surfaces or magnitudes …   English terms dictionary

• Plane — Plane, v. t. [imp. & p. p. {Planed}; p. pr. & vb. n. {Planing}.] [Cf. F. planer, L. planare, fr. planus. See {Plane}, a., {Plain}, a., and cf. {Planish}.] 1. To make smooth; to level; to pare off the inequalities of the surface of, as of a board… …   The Collaborative International Dictionary of English

• Plane — Plane, n. [F., fr. L. platanus, Gr. ?, fr. ? broad; so called on account of its broad leaves and spreading form. See {Place}, and cf. {Platane}, {Plantain} the tree.] (Bot.) Any tree of the genus {Platanus}. [1913 Webster] Note: The Oriental… …   The Collaborative International Dictionary of English