bivalent

Adjective
  1. Having a valence of two or having two valences (synset 303060476)
    referred to in: chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
    same as: divalent
  2. Used of homologous chromosomes associated in pairs in synapsis (synset 301550993)
    tells us about: valence, valency - (biology) a relative capacity to unite or react or interact as with antigens or a biological substrate
    referred to in: genetic science, genetics - the branch of biology that studies heredity and variation in organisms
    same as: double

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