polyvalent
adjective
poly·va·lent
ˌpä-lē-ˈvā-lənt 
also
pə-ˈli-və-lənt
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
Cite this Entry
“Polyvalent.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polyvalent. Accessed 29 Oct. 2025.
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polyvalent
adjective
poly·va·lent
ˌpäl-i-ˈvā-lənt
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
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