Find over 25,000 psychological definitions


n. any of a class of neuropeptides, found mainly in the pituitary gland, that function as endogenous opioids. The best known is beta-endorphin; the others are alpha-endorphin and gamma-endorphin. The production of endorphins during intense physical activity is one explanation for the runner’s high or exercise high, as well as for an athlete’s ability to feel little or no pain during a competition.

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

March 2nd 2024

affective psychosis

affective psychosis

a mood disorder accompanied by delusions or hallucinations (i.e., psychotic features). The mood disruption precedes the psychotic symptoms, and the psychotic symptoms only occur during a major depressive episode or a manic episode.