1. SYN: multivalent. 2. Pertaining to a p. antiserum.
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poly·va·lent .päl-i-'vā-lənt adj
1 a) having a chemical valence greater usu. 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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poly·va·lent (pol″e-vaґlənt) having more than one valence.Medical dictionary. 2011.