Webster's Revised Unabridged Dictionary · 1913

Trisoctahedron

Trisoctahedron , noun

[Greek {not transcribed} thrice + FE. octahedron.]

(Crystallography) A solid of the isometric system bounded by twenty-four equal faces, three corresponding to each face of an octahedron.
Collocations (2)
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.