Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

1. pertaining to fundamental physiological operations, like those engaged in development, breathing, sleeping, digesting, excreting waste, and homeostasis, that are overseen mainly by the ANS. 2. living in the absence of obvious mental neurological operation or reactivity, as in persistent state. 3. designating asexual reproduction, specifically in plants.

VEGETATIVE: "The patient has been in a vegetative state for the past month with no signs of neurological activity or precursors of wakefulness."

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