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pentavalent

[pen-tuh-vey-luh nt, pen-tav-uh-]
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adjective Chemistry.
  1. having a valence of 5: pentavalent arsenic.
  2. quinquevalent(def 2).
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Origin of pentavalent

First recorded in 1870–75; penta- + -valent
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for pentavalent

Historical Examples

  • Similarly, we have trivalent, tetravalent, pentavalent elements.

    An Elementary Study of Chemistry

    William McPherson


British Dictionary definitions for pentavalent

pentavalent

adjective
  1. chem having a valency of fiveAlso: quinquevalent
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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