Search Result for "ictodosaur": 
Wordnet 3.0

NOUN (1)

1. intermediate in form between the therapsids and most primitive true mammals; 



The Collaborative International Dictionary of English v.0.48:

ictodosaur \ictodosaur\ n.
   An extinct reptile intermediate in form between the
   therapsids and most primitive true mammals.
   [WordNet 1.5]


WordNet (r) 3.0 (2006):

ictodosaur
    n 1: intermediate in form between the therapsids and most
         primitive true mammals