Meaning of tetrahedral

tet•ra•he•dral

Pronunciation: (te"tru-hē'drul), [key]
— adj.
  1. pertaining to or having the form of a tetrahedron.
  2. having four lateral planes in addition to the top and bottom.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.