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trinomial

[trahy-noh-mee-uhl]

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adjective

Algebra. consisting of or pertaining to three terms.

Biology.

pertaining to a scientific name comprising three terms, as of genus, species, and subspecies or variety.

characterized by the use of such names.

noun

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.

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Trinomial is always a great word to know.

So is coordinate plane. Does it mean:

mathematical sentence built from expressions using one or more equal signs

graph with two axes and four quadrants

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Origin:
1665–75; tri- + (bi)nomial

Related forms

tri·no·mi·al·ly, adverb

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Collins

World English Dictionary

trinomial (traɪˈnəʊmɪəl)

—*adj*
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

—n
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

[C18: tri- + -nomial on the model of binomial]

tri'nomially

—*adv*

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage

Science Dictionary

trinomial

(trī-nō'mē-əl) Pronunciation Key

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.

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