Meaning of trisoctahedron

tris•oc•ta•he•dron

Pronunciation: (tris-ok"tu-hē'drun), [key]
— pl. -drons, -dra
  1. a solid bounded by 24 identical faces in groups of three, each group corresponding to one face of an octahedron.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.