trihedron

[ trahy-hee-druhn ]

noun

, Geometry.

, plural tri·he·drons, tri·he·dra [trahy-, hee, -dr, uh].

1. the figure determined by three planes meeting in a point.

trihedron

/ traɪˈhiːdrən /

noun

1. a figure determined by the intersection of three planes

Word History and Origins

Origin of trihedron¹

First recorded in 1820–30; tri- + -hedron