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trinomial

[trahy-noh-mee-uh l] /traɪˈnoʊ mi əl/
adjective
1.
Algebra. consisting of or pertaining to three terms.
2.
Biology.
  1. pertaining to a scientific name comprising three terms, as of genus, species, and subspecies or variety.
  2. characterized by the use of such names.
noun
3.
Algebra. an expression that is a sum or difference of three terms, as 3 x + 2 y + z or 3 x 3 + 2 x 2 + x.
4.
Biology. a trinomial name, as Rosa gallica pumila.
Origin
1665-1675
1665-75; tri- + (bi)nomial
Related forms
trinomially, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for trinomial
  • The resulting trinomial system consists of a state number, a county letter code, and then a sequential number within each county.
  • The trinomial, reducing the masked bobwhite to subspecific status, is presently the accepted nomenclature.
  • Only those which can adequately be represented by binomial or trinomial botanical nomenclature are included.
  • Discuss how factoring a trinomial can help you find the x-intercepts.
  • This is called trinomial nomenclature, and is written differently in zoology and botany.
British Dictionary definitions for trinomial

trinomial

/traɪˈnəʊmɪəl/
adjective
1.
(maths) consisting of or relating to three terms
2.
(biology) denoting or relating to the three-part name of an organism that incorporates its genus, species, and subspecies
noun
3.
(maths) a polynomial consisting of three terms, such as ax² + bx + c
4.
(biology) the third word in the trinomial name of an organism, which distinguishes between subspecies
Derived Forms
trinomially, adverb
Word Origin
C18: tri- + -nomial on the model of binomial
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
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trinomial in Science
trinomial
  (trī-nō'mē-əl)   
  1. A mathematical expression that is the sum of three monomials, such as ax2 + bx - c.

  2. A taxonomic designation indicating genus, species, and subspecies or variety, as in Brassica oleracea botrytis, the cauliflower.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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