'Tetragon' definitions:
Definition of 'tetragon'
From: WordNet
noun
A four-sided polygon [syn: quadrilateral, quadrangle, tetragon]
Definition of 'Tetragon'
From: GCIDE
- Tetragon \Tet"ra*gon\, n. [L. tetragonum, Gr. tetra`gwnon; te`tra- (see Tetra-) + gwni`a corner, angle: cf. F. t['e]tragone.]
- 1. (Geom.) A plane figure having four sides and angles; a quadrangle, as a square, a rhombus, etc. [1913 Webster]
- 2. (Astrol.) 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. --Hutton. [1913 Webster]