Pronunciation: (bī-vā'lunt, biv'u-), [key]
a. having a valence of two.
b. having two valences, as aluminum with valences of two and three.
2. Genetics.pertaining to associations of two homologous chromosomes.
Genetics.a pair of bivalent chromosomes, esp. when pairing during meiosis.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.