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.

 

© Webster 1913.

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