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Medical Definition of Aggressive instinct
1. The instinct of all living creatures toward self-destruction, death, or a return to the inorganic lifelessness from which they arose. Synonym: aggressive instinct. (05 Mar 2000)
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1. The instinct of all living creatures toward self-destruction, death, or a return to the inorganic lifelessness from which they arose. Synonym: aggressive instinct. (05 Mar 2000)