Algebra. consisting of or pertaining to three terms.
- pertaining to a scientific name comprising three terms, as of genus, species, and subspecies or variety.
- characterized by the use of such names.
Algebra. an expression that is a sum or difference of three terms, as 3x + 2y + z or 3x3 + 2x2 + x.
Biology. a trinomial name, as Rosa gallica pumila.
Related formstri·no·mi·al·ly, adverb
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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Historical Examples of trinomial
British Dictionary definitions for trinomial
maths consisting of or relating to three terms
biology denoting or relating to the three-part name of an organism that incorporates its genus, species, and subspecies
Derived Formstrinomially, adverb
maths a polynomial consisting of three terms, such as ax ² + bx + c
biology the third word in the trinomial name of an organism, which distinguishes between subspecies
Word Origin for trinomial
C18: tri- + -nomial on the model of binomial
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for trinomial
Online Etymology Dictionary, © 2010 Douglas Harper
A mathematical expression that is the sum of three monomials, such as ax2 + bx - c.
A taxonomic designation indicating genus, species, and subspecies or variety, as in Brassica oleracea botrytis, the cauliflower.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.