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A prismatoid having polygons with the same number of sides as bases, and faces that are parallelograms or trapezoids.
pris·moi′dal (-moid′l) adj.
(Mathematics) a prismatoid having an equal number of vertices in each of the two parallel planes and whose sides are trapeziums or parallelograms
[C18: from French prismoïde; see prism, -oid]
a solid having sides that are trapezoids and bases or ends that are parallel and similar but not congruent polygons. Compare prism (def. 2).
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|Noun||1.||prismoid - a prismatoid whose bases are polygons having the same number of sides and whose other faces are trapezoids or parallelograms|
prismatoid - a polyhedron whose vertices all lie in one or the other of two parallel planes; the faces that lie in those planes are the bases of the prismatoid