Tetragon
Tet´ra`gon
| n. | 1. | (Geom.) A plane figure having four sides and angles; a quadrangle, as a square, a rhombus, etc. |
| 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. |
| Noun | 1. |  tetragon - a four-sided polygonSynonyms: quadrangle, quadrilateral |