Search Result for "backwardness": 
Wordnet 3.0

NOUN (1)

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



The Collaborative International Dictionary of English v.0.48:

backwardness \back"ward*ness\, n.
   The state of being backward.
   [1913 Webster]


WordNet (r) 3.0 (2006):

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