Icosahedron
Pronunciation : I`co*sa*he"dron
Part of Speech : n.
Etymology : [Gr. (Geom.)
Definition : Defn: A solid bounded by twenty sides or faces. Regular icosahedron, one of the five regular polyhedrons, bounded by twenty equilateral triangules. Five triangules meet to form each solid angle of the polyhedron.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder