Hypertext Webster Gateway: "icositetrahedron"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Trisoctahedron \Tris*oc`ta*he"dron\, n. [Gr. ? thrice + FE.
octahedron.] (Crystallog.)
A solid of the isometric system bounded by twenty-four equal
faces, three corresponding to each face of an octahedron.
{Tetragonal trisoctahedron}, a trisoctahedron each face of
which is a quadrilateral; called also {trapezohedron} and
{icositetrahedron}.
{Trigonal trisoctahedron}, a trisoctahedron each face of
which is an isosceles triangle.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Icositetrahedron \I`co*si*tet`ra*he"dron\, n. [Gr. ? twenty + ?,
combining form of ? four + ? seat, base.] (Crystallog.)
A twenty-four-sided solid; a tetragonal trisoctahedron or
trapezohedron.
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