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quinquevalent

[kwing-kwuh-vey-luh nt, kwin-, kwin-kwev-uh-luh nt, kwing-] /ˌkwɪŋ kwəˈveɪ lənt, ˌkwɪn-, kwɪnˈkwɛv ə lənt, kwɪŋ-/
adjective, Chemistry
2.
exhibiting five valences, as phosphorus with valences 5, 4, 3, 1, and −3.
Origin
1875-1880
1875-80; quinque- + -valent
Related forms
quinquevalence
[kwing-kwuh-vey-luh ns, kwin-, kwin-kwev-uh-luh ns, kwing-] /ˌkwɪŋ kwəˈveɪ ləns, ˌkwɪn-, kwɪnˈkwɛv ə ləns, kwɪŋ-/ (Show IPA),
quinquevalency, noun
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for quinquevalence

quinquevalent

/ˌkwɪŋkwɪˈveɪlənt; kwɪnˈkwɛvələnt/
adjective
1.
(chem) another word for pentavalent
Derived Forms
quinquevalency, quinquevalence (ˌkwɪŋkwɪˈveɪləns; kwɪnˈkwɛvələns) 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
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