bivalent

形容词 bivalent:

1. having a valence of two or having two valences
   同义词：divalent
2. used of homologous chromosomes associated in pairs in synapsis
   同义词：double

bi.va.lent

adj.（形容词）
Chemistry Divalent.
【化学】 二价的
Biology Consisting of a pair of homologous, synapsed chromosomes, as occurs during meiosis; double.
【生物学】 二价染色体的：由一对同源，联会染色体组成的，如在成熟分裂时出现的；双的
n.Biology （名词）【生物学】
A pair of homologous, synapsed chromosomes associated together during meiosis.
二价染色体：在成熟分裂时联在一起的一对同源、联会染色体

【引伸】
biva.lence 或
biva.lency
n.（名词）