- moron
- 1910, from Gk. (Attic) moron, neut. of moros "foolish, dull" (probably cognate with Skt. murah "idiotic;" L. morus "foolish" is a loan-word from Gk.). Adopted by the American Association for the Study of the Feeble-minded with a technical definition "adult with a mental age between 8 and 12;" used as an insult since 1922 and subsequently dropped from technical use. Linnĉus had introduced morisis "idiocy."