- tetrastigm
- tetrastigm Geom.
(ˈtɛtrəstɪg(ə)m)[f. Gr. τετρα- tetra- + στίγµα prick, mark, point.]The complete figure composed of four points in a plane and their six connecting straight lines; commonly called complete quadrangle.[see tetragram 2].
Useful english dictionary. 2012.