Find over 25,000 psychological definitions


n. narrowing of blood vessels, which is controlled by vasomotor nerves of the sympathetic nervous system or by such agents as vasopressin or sympathomimetic drugs. It has the effect of increasing blood pressure. See also ergot derivative.

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

June 19th 2024



n. in infants, lack of psychomotor response or failure to gain weight or produce purposeful behavior, often thought to be a response to separation from mothers and subsequent institutionalization. See also reactive attachment disorder.