Source : Webster's Revised Unabridged Dictionary (1913)

Multivalent \Mul*tiv"a*lent\, a. [Multi- + L. valens, p. pr. See
   {Valence}.] (Chem.)
   (a) Having a valence greater than one, as silicon.
   (b) Having more than one degree of valence, as sulphur.

Source : WordNet®

multivalent
     adj 1: used of the association of three or more homologous
            chromosomes during the first division of meiosis [ant:
             {univalent}, {bivalent}]
     2: having more than one valence, or having a valence of 3 or
        higher [syn: {polyvalent}] [ant: {monovalent}]
     3: having many values, meanings, or appeals; "subtle,
        multivalent allegory" [syn: {multi-valued}]