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Webster 1913 Edition

Icositetrahedron

Iˊco-si-tetˊra-he′dron

,

Noun.

[Gr. [GREEK] twenty + [GREEK], combining form of [GREEK] four + [GREEK] seat, base.]

(Crystallog.)

A twenty-four-sided solid; a tetragonal trisoctahedron or trapezohedron.