polyvalent

1 of 2

adjective

poly·​va·​lent ˌpä-lē-ˈvā-lənt How to pronounce polyvalent (audio)
also
pə-ˈli-və-lənt How to pronounce polyvalent (audio)
1
: having a chemical valence greater usually than two
2
: effective against, sensitive toward, or counteracting more than one toxin, microorganism, or antigen
polyvalent vaccines

polyvalence

2 of 2

noun

poly·​valence
variants or polyvalency
¦pälē
-lə̇+
: the state of being polyvalent

Word History

Etymology

Adjective

International Scientific Vocabulary

Noun

polyvalence International Scientific Vocabulary, from polyvalent, after such pairs as English absent : absence; polyvalency from polyvalent + -cy

First Known Use

Adjective

1866, in the meaning defined at sense 1

Time Traveler
The first known use of polyvalent was in 1866

Browse Nearby Words

Cite this Entry

“Polyvalent.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polyvalent. Accessed 11 Jun. 2026.

Medical Definition

polyvalent

adjective
poly·​va·​lent ˌpäl-i-ˈvā-lənt How to pronounce polyvalent (audio)
1
a
: having a chemical valence greater usually than two
b
: having variable valence
2
: effective against, sensitive toward, or counteracting more than one exciting agent (as a toxin or antigen)
a polyvalent vaccine
polyvalence noun
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