[ bahy-noh-mee-uh l ]
/ baɪˈnoʊ mi əl /


Algebra. an expression that is a sum or difference of two terms, as 3x + 2y and x2 − 4x.
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.

Nearby words

  1. binocular fusion,
  2. binocular microscope,
  3. binocular rivalry,
  4. binocular vision,
  5. binoculars,
  6. binomial coefficient,
  7. binomial distribution,
  8. binomial experiment,
  9. binomial nomenclature,
  10. binomial series

Origin of binomial

1550–60; < Late Latin binōmi(us) having two names (compare Latin binōminis) + -al1. See bi-1, nominal

Related formsbi·no·mi·al·ism, nounbi·no·mi·al·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for binomial

British Dictionary definitions for binomial


/ (baɪˈnəʊmɪəl) /


a mathematical expression consisting of two terms, such as 3 x + 2 y
a two-part taxonomic name for an animal or plantSee binomial nomenclature


referring to two names or terms
Derived Formsbinomially, adverb

Word Origin for binomial

C16: from Medieval Latin binōmius from bi- 1 + Latin nōmen name

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

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

Medicine definitions for binomial


[ bī-nōmē-əl ]


Consisting of two terms or names, such as the genus and species names of organisms.


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.

Science definitions for binomial


[ bī-nōmē-əl ]

A mathematical expression that is the sum of two monomials, such as 3a + 2b.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.