The Collaborative International Dictionary
Tripinnatifid
Tripinnatifid \Tri`pin*nat"i*fid\, a. [Pref. tri- + pinnatifid.] (Bot.) Thrice pinnately cleft; -- said of a pinnatifid leaf when its segments are pinnatifid, and the subdivisions of these also are pinnatifid.
Wiktionary
tripinnatifid
a. (context botany English) thrice pinnately cleft; said of a pinnatifid leaf when its segments are pinnatifid, and the subdivisions of these also are pinnatifid.
WordNet
tripinnatifid
adj. of a leaf shape: bipinnatifid with segments pinnatifid