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
- subtrigonal adjective
- trigonally adverb
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
Borate anions range from the simple trigonal planar ion to complex species containing chains and rings of three- and four-coordinated boron atoms.
From Textbooks • Feb. 14, 2019
For example, an atom surrounded by three regions of electron density is sp2 hybridized, and the three sp2 orbitals are arranged in a trigonal planar fashion.
From Textbooks • Feb. 14, 2019
Perianth on a short branch, mostly trigonal with the odd angle beneath.
From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa
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.
