from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun That which the immune system identifies as foreign to the body.

from the GNU version of the Collaborative International Dictionary of English.

  • noun That which is not oneself.
  • noun (Immunology) Any material that enters the body and is not recognized by the immune system as being part of its body, thereby triggering an immune response; any material appearing to the immune system to be foreign to its body.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun philosophy, psychology Any entity other than oneself.
  • noun immunology, uncountable All agents and substances that are not body's own.


Sorry, no etymologies found.



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