trigonal
Americanadjective
-
of, relating to, or shaped like a triangle; having three angles; triangular.
-
Crystallography. having threefold symmetry.
adjective
-
another word for triangular
-
Also: rhombohedral. relating or belonging to the crystal system characterized by three equal axes that are equally inclined and not perpendicular to each other
-
Relating to a crystal having three axes of equal length intersecting at oblique angles. This crystal system is considered a subset of the hexagonal system. The mineral quartz has trigonal crystals.
-
Also called rhombohedral
-
See illustration at crystal
Other Word Forms
Etymology
Origin of trigonal
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.
In typical alkenes, the carbons adopt a trigonal planar geometry, creating a flat structure around the double bond.
From Science Daily ● Jan. 23, 2026
They believed the reason trigonal chloride electrolytes can achieve low ionic conductivity is based on the variation of metal ion arrangements within the structure.
From Science Daily ● Nov. 2, 2023
The three bonding regions form a trigonal planar electron-pair geometry.
From Textbooks ● Feb. 14, 2019
In trigonal bipyramidal arrangements, repulsion is minimized when every lone pair is in an equatorial position.
From Textbooks ● Feb. 14, 2019
Those with a triad axis are grouped together in the rhombohedral or trigonal division, and those with a hexad axis in the hexagonal division.
From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various
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.
