noun, plural tris·oc·ta·he·drons, tris·oc·ta·he·dra [tris-ok-tuh-hee-druh] /trɪsˌɒk təˈhi drə/.
a solid bounded by 24 identical faces in groups of three, each group corresponding to one face of an octahedron.
Origin of trisoctahedron
1840–50; < Greek trís thrice + octohedron
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
noun plural -drons or -dra (-drə)
a solid figure having 24 identical triangular faces, groups of three faces being formed on an underlying octahedron
Word Origin for trisoctahedron
C19: from Greek tris three times + octahedron
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012