Search Result for "neoteny": 
Wordnet 3.0

NOUN (1)

1. an evolutionary trend to be born earlier so that development is cut off at an earlier stage and juvenile characteristics are retained in adults of the species; 



WordNet (r) 3.0 (2006):

neoteny
    n 1: an evolutionary trend to be born earlier so that
         development is cut off at an earlier stage and juvenile
         characteristics are retained in adults of the species