- having, or formed by, three planes meeting in a point: a trihedral angle.
- a trihedron.
Origin of trihedral
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for trihedral
Historical Examples of trihedral
The angle between two planes is termed dihedral, between three trihedral, between any number more than three polyhedral.
A triangle and a trihedral angle are therefore reciprocal figures.
- having or formed by three plane faces meeting at a point
- a figure formed by the intersection of three lines in different planes
Word Origin for trihedral
C18: from tri- + Greek hedra base, seat + -al 1
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