Icosahedron Definition
ī-kōsə-hēdrən, ī-kŏsə-
icosahedra, icosahedrons
noun
A solid figure with twenty plane surfaces.
Webster's New World
Other Word Forms of Icosahedron
Noun
Singular:
icosahedron
Plural:
icosahedra, icosahedronsOrigin of Icosahedron
-
Greek eikosaedron from neuter of Greek eikosaedros twenty-sided eikosi twenty wīkm̥tī- in Indo-European roots -edros -sided –hedron
From American Heritage Dictionary of the English Language, 5th Edition
From Ancient Greek εἰκοσάεδρον (eikosaedron), from εἴκοσι (eikosi, “twenty”) + ἕδρα (hedra, “face of a geometrical solid”).
From Wiktionary
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