oligophrenia: Meaning and Definition of

ol•i•go•phre•ni•a

Pronunciation: (ol"i-gō-frē'nē-u, u-lig"u-), [key]
— n. Pathol.
  1. less than normal mental development.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.