trigonal
[trig-uh-nl]
adjective
of, relating to, or shaped like a triangle; having three angles; triangular.
Crystallography. having threefold symmetry.
Origin of trigonal
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Related Words for trigonal
trilateral, treble, triple, ternary, third, trinitarian, triangular, pyramidal, ternate, trichotomous, trigonal, trigonous, trinal, trinary, tripartite, cuneate, deltoid, deltoidal, hastate, pyriformExamples from the Web for trigonal
Historical Examples of trigonal
The leaves are trigonal; they are very short, and they are laid over each other like scales in four rows.
Botany for LadiesJane Loudon
Trigonal trapezohedron (fig. 74), bounded by six trapezoidal faces.
All other forms, in which the faces are neither parallel nor perpendicular to the triad axis, are trigonal pyramids.
Fig. 73 represents a crystal of tourmaline with the trigonal prism , hexagonal prism , and a trigonal pyramid at each end.
Parietes ribbed, mottled purplish-red; orifice broad, trigonal, hardly toothed.
A Monograph on the Sub-class Cirripedia (Volume 2 of 2)Charles Darwin
trigonal
adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
trigonal
[trī-gō′nəl]
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.