Dictionary![]() ![]() tet•ra•he•dronPronunciation: (te"tru-hē'drun), [key] —n., —pl. -drons, -draPronunciation: (-dru). [key] 1. Geom.a solid contained by four plane faces; a triangular pyramid. 2. any of various objects resembling a tetrahedron in the distribution of its faces or apexes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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