Univalent

from WordNet (r) 3.0 (2006)

univalent
    adj 1: used of a chromosome that is not paired or united with
           its homologous chromosome during synapsis; "a univalent
           chromosome" [ant: {bivalent}, {double}, {multivalent}]
    2: having a valence of 1 [syn: {monovalent}, {univalent}] [ant:
       {multivalent}, {polyvalent}]

from The Collaborative International Dictionary of English v.0.48

Univalent \U*niv"a*lent\, a. [Uni- + L. valens, -entis, p. pr.
   See {Valence}.] (Chem.)
   Having a valence of one; capable of combining with, or of
   being substituted for, one atom of hydrogen; monovalent; --
   said of certain atoms and radicals.
   [1913 Webster]

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