polyvalent

from WordNet (r) 3.0 (2006)

polyvalent
    adj 1: containing several antibodies each capable of
           counteracting a specific antigen; "a polyvalent vaccine"
           [ant: {monovalent}]
    2: having more than one valence, or having a valence of 3 or
       higher [syn: {polyvalent}, {multivalent}] [ant: {monovalent},
       {univalent}]

from The Collaborative International Dictionary of English v.0.48

Polyvalent \Po*lyv"a*lent\, a. [Poly- + L. valens, p. pr. See
   {Valent}.] (Chem.)
   Multivalent.
   [1913 Webster]