tetrahedron
[ te-truh-hee-druhn ]
/ ˌtɛ trəˈhi drən /
noun, plural tet·ra·he·drons, tet·ra·he·dra [te-truh-hee-druh]. /ˌtɛ trəˈhi drə/.
Geometry. a solid contained by four plane faces; a triangular pyramid.
any of various objects resembling a tetrahedron in the distribution of its faces or apexes.
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Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for tetrahedron
The atoms are arranged in two tetrahedra with a common apex, and the relationship is maintained in the meta-body, a septet.
Occult Chemistry|Annie Besant and Charles W. LeadbeaterThe globe, e, is a new form, the four tetrahedra of the proto level making a single twelve-atomed one on the meta.
Occult Chemistry|Annie Besant and Charles W. LeadbeaterThe smallest particles of fire are tetrahedra, of air octahedra, of water icosahedra.
A Critical History of Greek Philosophy|W. T. Stace
British Dictionary definitions for tetrahedron
tetrahedron
/ (ˌtɛtrəˈhiːdrən) /
noun plural -drons or -dra (-drə)
a solid figure having four plane faces. A regular tetrahedron has faces that are equilateral trianglesSee also polyhedron
any object shaped like a tetrahedron
Derived forms of tetrahedron
tetrahedral, adjectivetetrahedrally, adverbWord Origin for tetrahedron
C16: from New Latin, from Late Greek tetraedron; see tetra-, -hedron
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Scientific definitions for tetrahedron
tetrahedron
[ tĕt′rə-hē′drən ]
Plural tetrahedrons tetrahedra
A polyhedron having four faces.
The American Heritage® Science Dictionary
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