Wordnet 3.0
ADJECTIVE (1)
1. 
 resembling a catkin; 
The Collaborative International Dictionary of English v.0.48:
catkinate \catkinate\ adj.
   of, pertaining to, or resembling a catkin.
   [WordNet 1.5]
WordNet (r) 3.0 (2006):
catkinate
    adj 1: resembling a catkin