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decahedron (n.)

in geometry, "a solid having ten faces," 1828, from deca- "ten" + -hedron, from Greek hedra "seat, base, chair, face of a geometric solid," from PIE root *sed- (1) "to sit."  Related: Decahedral.

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Definitions of decahedron

decahedron (n.)
any polyhedron having ten plane faces;
From wordnet.princeton.edu