(|)dī+ adjective
Etymology: dipyramid + -al
1. : having the shape of a dipyramid
2. : having symmetry such that the general form is a dipyramid — used of certain of the 32 classes of symmetry
(|)dī+ adjective
Etymology: dipyramid + -al
1. : having the shape of a dipyramid
2. : having symmetry such that the general form is a dipyramid — used of certain of the 32 classes of symmetry
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012