tetrahedron
noun
a solid contained by four plane faces; a triangular pyramid.
tetrahedra
-
pluralof tetrahedron.plural
The grammatical form denoting more than one person, place, thing, or idea.
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.
One part copper, two parts vanadium and four parts sulfur, the alloy features a 3D pyrochlore lattice consisting of corner-sharing tetrahedra.
From Science Daily ● Jan. 29, 2024
There is a variation in the silicon- to-oxygen ratio that occurs because silicon-oxygen tetrahedra may exist as discrete, independent units or may share oxygen atoms at corners in a variety of ways.
From Textbooks ● Feb. 14, 2019
In nearly all silicates, sp3-hybridized silicon atoms occur at the centers of tetrahedra with oxygen at the corners.
From Textbooks ● Feb. 14, 2019
Silica tetrahedra are bonded in three-dimensional frameworks in both the feldspars and quartz.
From Textbooks ● Jan. 1, 2015
Two parallel triangular faces are removed from a cardboard model of a regular octahedron, and on the remaining six faces tetrahedra are then placed; the hydrogen atoms are at the free angles.
From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" by Various
