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Definition of Quadrivalent
1. a. Having a valence of four; capable of combining with, being replaced by, or compared with, four monad atoms; tetravalent; -- said of certain atoms and radicals; thus, carbon and silicon are quadrivalent elements.
Definition of Quadrivalent
1. [n -S]
Medical Definition of Quadrivalent
1. Describes an association of four homologous chromosomes at meiosis. (09 Oct 1997)