Defn: Pertaining to, or of the nature of, a diagram; showing by
diagram.
— Di`a*gram*mat"ic*ly, adv.

DIAGRAPH
Di"a*graph, n. Etym: [Gr. diagraphe. See Diagram.]

Defn: A drawing instrument, combining a protractor and scale.

DIAGRAPHIC; DIAGRAPHICAL
Di`a*graph"ic, Di`a*graph"ic*al, a. Etym: [Cf. F. diagraphique.]

Defn: Descriptive.

DIAGRAPHICS
Di`a*graph"ics, n.

Defn: The art or science of descriptive drawing; especially, the art or science of drawing by mechanical appliances and mathematical rule.

DIAHELIOTROPIC
Di`a*he`li*o*trop"ic, a. Etym: [Gr. (Bot.)

Defn: Relating or, or manifesting, diaheliotropism.

DIAHELIOTROPISM
Di`a*he`li*ot"ro*pism, n. (Bot.)