nonself

non·self

[non-self]
noun Immunology.
any antigen-bearing foreign material that enters the body and normally stimulates an attack by the body's immune system ( distinguished from self ).

Origin:
1870–75; non- + self

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American Heritage
Medical Dictionary

nonself non·self (nŏn-sělf')
n.
That which the immune system identifies as foreign to the body.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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00:10
Nonself is always a great word to know.
So is callithumpian. Does it mean:
a chattering or flighty, light-headed person.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
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