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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
“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


noun

  1. a figure formed by the intersection of three lines in different planes
“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
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Other Words From

  • subtri·hedral adjective
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Word History and Origins

Origin of trihedral1

First recorded in 1780–90; tri- + -hedral
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Word History and Origins

Origin of trihedral1

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

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.

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trihalomethanetrihedron