[ trahy-hee-druh l ]
/ traɪˈhi drəl /
having, or formed by, three planes meeting in a point: a trihedral angle.
Related formssub·tri·he·dral, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for trihedral
A triangle and a trihedral angle are therefore reciprocal figures.
The angle between two planes is termed dihedral, between three trihedral, between any number more than three polyhedral.
British Dictionary definitions for trihedral
/ (traɪˈhiːdrəl) /
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