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[bahy-noh-mee-uh l] /baɪˈnoʊ mi əl/
Algebra. an expression that is a sum or difference of two terms, as 3 x + 2 y and x 2 − 4 x.
Zoology, Botany. a taxonomic name consisting of a generic and a specific term, used to designate species.
Algebra. consisting of or pertaining to two terms or a binomial.
Zoology, Botany. consisting of or characterized by binomials.
Origin of binomial
1550-60; < Late Latin binōmi(us) having two names (compare Latin binōminis) + -al1. See bi-1, nominal
Related forms
binomialism, noun
binomially, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for binomial
Historical Examples
  • A binomial in algebra is a quantity consisting of two terms.

    Orthography Elmer W. Cavins
  • The dot is used to indicate that the root of the binomial (not of 136 alone) is called for.

    William Oughtred Florian Cajori
  • You might as well try to rush the Proof of the binomial Theorem.

  • Review the method of finding the square root of a binomial surd.

    A Review of Algebra Romeyn Henry Rivenburg
  • (a) Write the middle term of the expansion of by the binomial theorem.

    A Review of Algebra Romeyn Henry Rivenburg
  • Very like the binomial Theorem as one thought over that comparison.

    Soul of a Bishop H. G. Wells
  • Oughtred lays great stress upon expansions of powers of a binomial.

    William Oughtred Florian Cajori
  • Thus Linnaeus became the acknowledged originator of the binomial (two-name) system of nomenclature now in use in all sciences.

    Trees Worth Knowing Julia Ellen Rogers
  • binomial, of two words, as the name of genus and species taken together, 180.

  • At nineteen such a woman is still immature; and moreover until she was twenty, Honoria had not mastered the binomial Theorem.

    Mrs. Warren's Daughter Sir Harry Johnston
British Dictionary definitions for binomial


a mathematical expression consisting of two terms, such as 3x + 2y
a two-part taxonomic name for an animal or plant See binomial nomenclature
referring to two names or terms
Derived Forms
binomially, adverb
Word Origin
C16: from Medieval Latin binōmius from bi-1 + Latin nōmenname
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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Contemporary definitions for binomial
noun's 21st Century Lexicon
Copyright © 2003-2014, LLC
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Word Origin and History for binomial

1550s (n.); 1560s (adj.), from Late Latin binomius "having two personal names," a hybrid from bi- (see bi-) + nomius, from nomen (see name (n.)). Taken up 16c. in the algebraic sense "consisting of two terms."

Online Etymology Dictionary, © 2010 Douglas Harper
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binomial in Medicine

binomial bi·no·mi·al (bī-nō'mē-əl)
Consisting of two terms or names, such as the genus and species names of organisms. n.
A taxonomic name used in binomial nomenclature.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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binomial in Science
A mathematical expression that is the sum of two monomials, such as 3a + 2b.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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