icosahedron
(noun) any polyhedron having twenty plane faces
Source: WordNet® 3.1
icosahedra
plural of icosahedron
Source: Wiktionary
I`co*sa*he"dron, n. Etym: [Gr. (Geom.)
Definition: 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 Edition
7 May 2025
(noun) a person who is employed to deliver messages or documents; “he sent a runner over with the contract”
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