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Meaning of alloantigen

al•lo•an•ti•gen

Pronunciation: (al"ō-an'ti-jun, -jen"), [key]
— n. Immunol.
  1. an antigen present in some but not all individuals of the same species, as those in different human blood groups.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.