icosahedron

A regular icosahedron

Meaning

Noun

A polyhedron with twenty faces.
A regular icosahedron: one of the Platonic solids, all of whose faces are regular (equilateral) triangles

Origin

From Ancient Greek εἰκοσάεδρον, from εἴκοσι + ἕδρα. Equivalent to icosa- + -hedron.

Modern English dictionary

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