Search Result for "mental retardation":
Wordnet 3.0

NOUN (1)

1. lack of normal development of intellectual capacities;
[syn: retardation, mental retardation, backwardness, slowness, subnormality]



WordNet (r) 3.0 (2006):

mental retardation
    n 1: lack of normal development of intellectual capacities [syn:
         retardation, mental retardation, backwardness,
         slowness, subnormality]