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1. Chemistry Having valence 5.
2. Immunology
a. Having five sites of attachment. Used of an antibody or antigen.
b. Containing antigens from five strains of a microorganism or virus. Used of a vaccine or serum.


(Chemistry) chem having a valency of five. Also: quinquevalent


(ˌpɛn təˈveɪ lənt, pɛnˈtæv ə-)

1. having a valence of five: pentavalent arsenic.
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Adj.1.pentavalent - having a valence of five
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
References in periodicals archive ?
Pentavalent antimony compounds like meglumine antimoniate are the main therapeutic agents for various forms of leishmaniasis1,3 with efficacy as high as 93% with standard intramuscular dose of 20mg of antimony/kg/day4 However, because of requirement for parenteral administration, side effects, such as hepatotoxicity and cardiac toxicity, and emergence of resistant strains, there has been an intensive search for alternative therapies.
Pentavalent antimony compounds (glucantime and pentostam), chloroquine, pentamidine, metronidazole, ketoconazole, dapsone, itraconazole, terbinafine and rifampicin are common systemic drugs that are prescribed for CL (23).
It is estimated that more than 200,000 patients have been treated with pentavalent antimony compounds in the past 80 years.