n.
Pronunciation: ( ˌ ) ā - ' men(t)-sh( ē -) ə , ( ˌ )ä-
Function: noun
Etymology: New Latin, from Latin, madness, from ament-, amens mad, from a- (fr. ab- ) + ment-, mens mind ― more at MIND
Date: 14th century
: MENTAL RETARDATION specifically : a condition of lack of development of intellectual capacity