Tetragon

[tetrәgɒn]

(n.) A plane figure having four sides and angles; a quadrangle, as a square, a rhombus, etc.

(n.) An aspect of two planets with regard to the earth when they are distant from each other ninety degrees, or the fourth of a circle.

Checker: Susie

n. a figure of four angles.—adj. Tetrag′onal.

Inputed by Enoch