Find over 25,000 psychological definitions


sexual selection

a theoretical mechanism for the evolution of anatomical and behavioral differences between males and females, based on mate selection. [proposed in 1871 by Charles Darwin]

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 14th 2025

teratogen

teratogen

n. an agent that induces developmental abnormalities in a fetus. The process that results in these abnormalities is called teratogenesis; a teratomorph is a fetus or offspring with these abnormalities.