tetrahedron
Americannoun
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Geometry. a solid contained by four plane faces; a triangular pyramid.
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any of various objects resembling a tetrahedron in the distribution of its faces or apexes.
noun
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a solid figure having four plane faces. A regular tetrahedron has faces that are equilateral triangles See also polyhedron
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any object shaped like a tetrahedron
Other Word Forms
Derived Forms
Etymology
Origin of tetrahedron
1560–70; tetra- + -hedron, modeled on Late Greek tetráedron, noun use of neuter of tetráedros four-sided
Vocabulary lists containing tetrahedron
UCPS 6th Grade Roots List #5
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Organic Chemistry
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Many elements overlapped, forming a multidimensional sculpture: a triangle might jut out of a tetrahedron and meet another triangle at a point.
From Scientific American • Sep. 26, 2022
For example, a tetrahedron, a solid three-dimensional pyramid with four triangular faces, would fill in a group of four neurons firing together.
From Scientific American • Sep. 26, 2022
As a solid, as a liquid, as a gas, and in solution, white phosphorus exists as P4 molecules with four phosphorus atoms at the corners of a regular tetrahedron, as illustrated in Figure 18.24.
From Textbooks • Feb. 14, 2019
For example, the nitrogen atom in ammonia is surrounded by three bonding pairs and a lone pair of electrons directed to the four corners of a tetrahedron.
From Textbooks • Feb. 14, 2019
Pathfinder's final stage of descent was a balloon-covered tetrahedron.
From "The Martian" by Andy Weir
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
