Definify.com
Webster 1913 Edition
Tetrahedral
1.
Having, or composed of, four sides.
2.
(Crystallog.)
(a)
Having the form of the regular tetrahedron.
(b)
Pertaining or related to a tetrahedron, or to the system of hemihedral forms to which the tetrahedron belongs.
Tetrahedral angle
(Geom.)
, a solid angle bounded or inclosed by four plane angles.
Webster 1828 Edition
Tetrahedral
TETRAHE'DRAL
,Adj.
1.
Having four equal triangles.2.
In botany, having four sides, as a pod or silique.