See Also: prismatoid(dictionary)

prismatoid (iou)



prismatoid adjective & noun. M19.
[from Greek prismat-, prisma PRISM + -OID.]
A. adjective. Crystallography. Of a plane: parallel to one of the three coordinate axes and intersecting the other two. Cf. PINACOID. M19.
b. noun. Geometry. A solid figure having parallel polygonal ends connected by triangular faces. L19.