1. (chemistry) having a valence of two or having two valences
   "This can be explained by a lower total coordination of the bivalent atoms";
   - divalent
    
2. (genetics) used of homologous chromosomes associated in pairs in synapsis
   "During meiosis, bivalent chromosomes align along the metaphase plate";
   - double

See also: valence, valency

Antonym: multivalent, univalent

Encyclopedia: Bivalent