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bivalent

[bahy-vey-luh nt, biv-uh-]
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adjective
  1. Chemistry.
    1. having a valence of two.
    2. having two valences, as aluminum with valences of two and three.
  2. Genetics. pertaining to associations of two homologous chromosomes.
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noun
  1. Genetics. a pair of bivalent chromosomes, especially when pairing during meiosis.
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Origin of bivalent

First recorded in 1865–70; bi-1 + -valent
Related formsbi·va·lence [bahy-vey-luh ns, biv-uh-luh ns] /baɪˈveɪ ləns, ˈbɪv ə ləns/, bi·va·len·cy, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for bivalence

bivalence

noun
  1. logic philosophy the semantic principle that there are exactly two truth values, so that every meaningful statement is either true or falseCompare many-valued logic
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bivalent

adjective
  1. chem another word for divalent
  2. (of homologous chromosomes) associated together in pairs
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noun
  1. a structure formed during meiosis consisting of two homologous chromosomes associated together
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Derived Formsbivalency, noun
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 bivalence

n.

1868; see bivalent + -ence.

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bivalent

adj.

1864, of chemicals, 1899, of chromosomes, from bi- + -valent, from Latin valentem, present participle of valere "be worth" (see valiant).

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Online Etymology Dictionary, © 2010 Douglas Harper

bivalence in Medicine

bivalent

(bī-vālənt)
adj.
  1. Having a valence of 2; divalent.
  2. Consisting of a pair of homologous, synapsed chromosomes, as occurs during meiosis; double.
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n.
  1. A pair of homologous, synapsed chromosomes associated together during meiosis.
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Related formsbi•valence null n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

bivalence in Science

bivalent

[bī-vālənt]
  1. Chemistry Having a valence of 2.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.