immobility

n. a condition in which an organism shows no signs of motion, as in death feigning or freezing behavior. This may occur in response to sudden stimuli that might be associated with a predator, or it may be elicited in a fear-conditioning study as a learned response to an aversively conditioned signal. —immobile adj.

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Psychology term of the day

December 21st 2024

azathioprine

n. a drug used to suppress the immune response. It is the most widely used drug in support of organ transplantation and potentially severe cases of immune reactions. U.S. trade name (among others): Imuran.