trihedral

[ trahy-hee-druhl ]

adjective

, Geometry.

1. having, or formed by, three planes meeting in a point:

   a trihedral angle.

noun

1. a trihedron.

trihedral

/ traɪˈhiːdrəl /

adjective

1. having or formed by three plane faces meeting at a point

noun

1. a figure formed by the intersection of three lines in different planes

Other Words From

• subtri·hedral adjective

Word History and Origins

Origin of trihedral¹

First recorded in 1780–90; tri- + -hedral

Word History and Origins

Origin of trihedral¹

C18: from tri- + Greek hedra base, seat + -al ¹

Example Sentences

A triangle and a trihedral angle are therefore reciprocal figures.

From Project Gutenberg

The angle between two planes is termed dihedral, between three trihedral, between any number more than three polyhedral.

From Project Gutenberg