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bivalent

a. 二原子价的

二原子价的

WordNet (r) 3.0 (2006) (WordNet)

bivalent
adj 1: having a valence of two or having two valences [synonym:
{bivalent}, {divalent}]
2: used of homologous chromosomes associated in pairs in
synapsis [synonym: {bivalent}, {double}] [ant: {multivalent},
{univalent}]

The Collaborative International Dictionary of English v.0.48 (gcide)

Bivalent \Biv"a*lent\, a. [L. bis twice valens, p. pr. See
{Valence}.] (Chem.)
Equivalent in combining or displacing power to two atoms of
hydrogen; dyad.
[1913 Webster]

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