English Explanatory Dictionary

icosahedron

English dictionary entry

Meanings

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

Pronunciation

/ˌaɪkoʊsəˈhiːdɹən/ /ˌaɪkɒsəˈhiːdɹən/ /ˌaɪkɔsəˈhiːdɹən/ En-us-icosahedron.oga

Word forms

icosahedron icosahedra icosahedrons eicosaedrum icosaedrum

Etymology

From Ancient Greek εἰκοσάεδρον (eikosáedron), from εἴκοσι (eíkosi, “twenty”) + ἕδρα (hédra, “face of a geometrical solid”). Equivalent to icosa- + -hedron.

Synonyms

regular gyroelongated pentagonal bipyramid

Related words

icosahedral icosahedrite

Derived words

great icosahedron hemi-icosahedron icosahedronic supericosahedron triakis icosahedron truncated icosahedron
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