Find over 25,000 psychological definitions


n. an animal whose body temperature is regulated chiefly by internal metabolic processes. The only true endotherms are mammals and birds. Such animals, formerly called homeotherms, are popularly described as warm-blooded. Compare ectotherm. —endothermic adj. —endothermy n.

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

February 26th 2024



n. red–green color blindness in which the deficiency is due to absence of the cone photopigment sensitive to green light, resulting in loss of green sensitivity and confusion between red and green (see dichromatism). The condition may be unilateral (i.e., color vision may be normal in one eye). See also protanopia.