The Collaborative International Dictionary of English v.0.48:

Nondevelopment \Non`de*vel"op*ment\, n.
   Failure or lack of development.
   [1913 Webster]

WordNet (r) 3.0 (2006):

nondevelopment
    n 1: failure of normal development to occur [ant: development,
         growing, growth, maturation, ontogenesis,
         ontogeny]