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Pertaining to the art, or in accordance with the laws, of perspective. Perspective plane, the plane or surface on which the objects are delineated, or the picture drawn; the plane of projection; -- distinguished from the ground plane, which is that on which the objects are represented as standing. When this plane is ob…

Optically; as through a glass. [R.] You see them perspectively. Shak.

point in which a right line, drawn from the eye, parallel to a given right line, cuts the perspective plane; so called to distinguish it from the principal point, or point of view, where a line drawn from the eye perpendicular to the perspective plane meets this plane. -- Accidental lights (Paint.), secondary lights;…

Light as air; ethereal. Aërial acid, carbonic acid. [Obs.] Ure. -- Aërial perspective. See Perspective.

as if extended in a direction toward the spectator or nearly so; to shorten by drawing in perspective.

on the principles of the globular projection. -- Globular projection (Map Projection), a perspective projection of the surface of a hemisphere upon a plane parallel to the base of the hemisphere, the point of sight being taken in the axis produced beyond the surface of the opposite hemisphere a distance equal to the r…

The art or the science of drawing; esp. of drawing according to mathematical rules, as in perspective, projection, and the like.

evation or perpendicular section. -- Ground plane, the horizontal plane of projection in perspective drawing. -- Ground plate. (a) (Arch.) One of the chief pieces of framing of a building; a timber laid horizontally on or near the ground to support the uprights; a ground sill or groundsel. (b) (Railroads) A bed plate…

s of pressure and temperature in a gas, when the volume remains constant. -- Isometrical perspective. See under Perspective. -- Isometrical projection, a species of orthographic projection, in which but a single plane of projection is used. It is so named from the fact that the projections of three equal lines, paral…

he plane of projection. Such a projection of the sphere represents its circles as seen in perspective by an eye supposed to be placed at an infinite distance, the plane of projection passing through the center of the sphere perpendicularly to the line of sight.

The science or art of delineating objects according to the laws of perspective; the theory of perspective.

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…

-- Principal ray (Persp.), the line drawn through the point of sight perpendicular to the perspective plane. -- Principal section (Crystallog.), a plane passing through the optical axis of a crystal.

tation of something; delineation; plan; especially, the representation of any object on a perspective plane, or such a delineation as would result were the chief points of the object thrown forward upon the plane, each in the direction of a line drawn through it from a given point of sight, or central point; as, the pr…

Of or pertaining to a prospect; furnishing a prospect; perspective. [Obs.] Time's long and dark prospective glass. Milton.

A perspective representation or general view of an object.

Of or pertaining to scenography; drawn in perspective. -- Scen`o*graph"ic*al*ly, adv.

The art or act of representing a body on a perspective plane; also, a representation or description of a body, in all its dimensions, as it appears to the eye. Greenhill.

s conical, and usually has a large, deep umbilicus exposing the upper whorls. Called also perspective shell.

Staircase shell. (Zoöl.) (a) Any scalaria, or wentletrap. (b) Any species of Solarium, or perspective shell.