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1. Genetics Relating to or being a pair of homologous, side-by-side chromosomes, especially during meiosis; double.
2. Chemistry & Immunology Divalent.

bi·va′lence, bi·va′len·cy n.
References in periodicals archive ?
Fusion lengthens serum half-life, and introduces bivalency which increases affinity for TNF.
This concept specifies the economy of the archaic narcissistic equilibrium in which, due to its extreme mirror-schizoid bivalency, symbiotic omnipotence and impotence are equipollent and conterminous.
Bivalency increases the functional affinity, called avidity, of the antibody for its target antigen and allows for clumping or agglutination of antibody/antigen complexes.