I. (ˈ)bī+ adjective
Etymology: bi- (I) + valent; translation of German zweiwertig
1. : having a valence of two
2. : double — used of homologous chromosomes associated in pairs in synapsis
3.
a. of an antigen, hapten, or antibody : having two sites for combination with antibody or antigen
b. of an antibody : capable of producing agglutination or precipitation under ordinary experimental conditions
II. noun
( -s )
: a pair of synaptic chromosomes