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tetrahedral

[te-truh-hee-druh l]
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adjective
  1. pertaining to or having the form of a tetrahedron.
  2. having four lateral planes in addition to the top and bottom.
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Origin of tetrahedral

First recorded in 1785–95; tetrahedr(on) + -al1
Related formstet·ra·he·dral·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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