n. [ Gr. &unr_; to draw: cf. F. diagraphe. See Diagram. ] A drawing instrument, combining a protractor and scale.

{ } a. [ Cf. F. diagraphique. ] Descriptive. [ 1913 Webster ]

n. The art or science of descriptive drawing; especially, the art or science of drawing by mechanical appliances and mathematical rule. [ 1913 Webster ]