trihedron

American  

[trahy-hee-druhn] / traɪˈhi drən /

noun

Geometry.

trihedrons, plural trihedra plural

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

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trihedron British  

/ traɪˈhiːdrən /

noun

1. a figure determined by the intersection of three planes

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Other Word Forms

Noun Inflected Forms

• trihedra
  plural
• trihedrons
  plural

Etymology

Origin of trihedron

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

Example Sentences

See Examples For:

trihedrons

So trihedrons, tetrahedrons, pentahedrons, &c., though some say, these last may end in dra, which I think improper.

From The Grammar of English Grammars by Brown, Goold