• synonyms


[yoo-nuh-vey-luh nt, yoo-niv-uh-]
  1. Chemistry. having a valence of one; monovalent.
  2. Genetics. (of a chromosome) single; unpaired; not possessing or joining its homologous chromosome in synapsis.
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Origin of univalent

First recorded in 1865–70; uni- + -valent
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for univalent

Historical Examples of univalent

  • The elements of the group are univalent in their compounds with hydrogen and the metals.

    An Elementary Study of Chemistry

    William McPherson

  • Monoxide, mo-nok′sīd, n. an oxide containing a single oxygen atom in combination with two univalent atoms or one bivalent atom.

  • Diamond-shaped tetrad with spindle-fibers attached; a-a, probably halves of one univalent chromosome; b-b, halves of the other.

  • An atom with an extra corpuscle is a univalent negative ion, an atom with one corpuscle detached is a univalent positive ion.

  • Univalent hydrogen and divalent oxygen will then have the symbols H- and -O-.

British Dictionary definitions for univalent


  1. (of a chromosome during meiosis) not paired with its homologue
  2. chem another word for monovalent
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Derived Formsunivalency, 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

univalent in Medicine


  1. Having valence 1.
  2. Having only one valence.
  3. Of or relating to a chromosome that is not paired or united with its homologous chromosome during synapsis.
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  1. A univalent chromosome.
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Related formsu′ni•valence null n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

univalent in Science


  1. Having a valence of 1.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.