tetrastigmn.
/ˈtɛtrəstɪɡ(ə)m/ Geometry.
The complete figure composed of four points in a plane and their six connecting straight lines; commonly called complete quadrangle.
ΘΚΠ
the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > other
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1863 R. Townsend Chapters on Mod. Geom. I. vii. 145 Thus, for instance, in a tetrastigm or tetragram every line of connection of two points or point of intersection of two lines is said to be the opposite of that of the remaining two.
This entry has not yet been fully updated (first published 1911; most recently modified version published online September 2018).
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n.1863