Wordnet 3.0
ADJECTIVE (1)
1.
(of a leaf shape) cleft nearly to the midrib in broad divisions not separated into distinct leaflets;
The Collaborative International Dictionary of English v.0.48:
Pinnatifid \Pin*nat"i*fid\, a. [L. pinnatus feathered + root of
findere to split: cf. F. pinnatifide.] (Bot.)
Divided in a pinnate manner, with the divisions not reaching
to the midrib.
[1913 Webster]
WordNet (r) 3.0 (2006):
pinnatifid
adj 1: (of a leaf shape) cleft nearly to the midrib in broad
divisions not separated into distinct leaflets