- A sum of the attitudes, feelings, memories, traits, and behavioral predispositions that make up the personality.
- The individual person as represented in his or her own awareness and in his or her environment.
- A generalized, everyday term for ego or persona.
- In immunology, an individual's autologous cell components as contrasted with non-self, or foreign, constituents; the basic mechanism underlying recognition of self from non-self is unknown, but serves to protect the host from an immunologic attack on the host's own antigenic constituents, as opposed to immune system destruction or elimination of foreign antigens.
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Examples: glitazone, GI cocktail, etc.