trisoctahedron Geom. and Cryst.
(ˌtrɪsɒktəˈhiːdrən, -ˈhɛdrən)
[f. tris- + octahedron.]
A solid figure having 24 faces, every three of which correspond to one face of an octahedron: either with triangular faces (= triakisoctahedron), or with trapezoidal faces (= deltohedron, icositetrahedron, or trapezohedron). Hence ˌtrisoctaˈhedral a., pertaining to or having the form of a trisoctahedron.
| 1847 Webster (citing Dana), Trisoctahedron. 1891 Cent. Dict., Trisoctahedral. |