Definition of "antigenic"

antigenic¹

adjective
not comparable
1. (immunology) Of or relating to an antigen.

antigenic²

adjective
not comparable
1. (biology, obsolete) Sexually dimorphic, especially with reference to lepidopterans.
  Quotations
  [I]n which case, the males are normal, and the species generally antigenic.
  1889, Samuel Hubbard Scudder, The Butterflies of the Eastern United States and Canada, volume 1, page 535