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Webster's Dictionary (1865)

Pêr/spee-tŏg'ra-phy, n.

noun

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

A cube is shown in isometrical perspective inside a circle, with different shading on its three visible faces.
Cube seen in Isometri- cal Perspective.
A checkerboard road and rows of buildings recede toward a central vanishing point, with perspective lines marked around the scene.
Linear Perspective.