(thing) by General Wesc Sat Nov 13 1999 at 14:29:07

A polyhedron with five faces. A regular pentahedron is impossible but a non-regular one is just a pyramid (Four side faces and one base).

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(definition) by Webster 1913 Wed Dec 22 1999 at 1:53:39

Pen`ta*he"dron (?), n. [Penta- + Gr. "e`dra seat, base.]

A solid figure having five sides.

 

© Webster 1913.

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