Tetrahedron Definition
tĕtrə-hēdrən
tetrahedra, tetrahedrons
noun
A solid figure with four triangular faces.
Webster's New World
Other Word Forms of Tetrahedron
Noun
Singular:
tetrahedronPlural:
tetrahedra, tetrahedronsOrigin of Tetrahedron
From Ancient Greek τετράεδρόν (tetraedron, “triangle-based pyramid"), from τετράεδρός, from τετράς (tetras, “four") + ἕδρα (hedra, “seat").
From Wiktionary
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Greek tetraedron from neuter of tetraedros four-faced tetra- tetra- -hedros sided –hedron
From American Heritage Dictionary of the English Language, 5th Edition
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