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(immunology, of an antibody) Acting against the organism in which it occurs.
plural antiselves
An entity opposing or reflecting a self. quotations examples
There could be whole antiworlds and antipeople made out of antiparticles. However, if you meet your antiself, don't shake hands!
1988, Stephen Hawking, A Brief History of Time: From the Big Bang to Black Holes, page 75
The Western movies, of course, are not cultural visions, but the vicious encounters with the antiselves of civilization, the invented savage.
1999, Gerald R. Vizenor, Manifest Manners: Narratives on Postindian Survivance, page 7