noun Immunology.

  1. a substance having a single antigenic determinant that can react with a previously existing antibody but cannot stimulate more antibody production unless combined with other molecules; a partial antigen.


  1. immunol an incomplete antigen that can stimulate antibody production only when it is chemically combined with a particular protein


  1. A substance that is capable of reacting with a specific antibody but cannot induce the formation of antibodies unless bound to a carrier protein or other molecule.incomplete antigen partial antigen
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