a. [ Pref. bi- + pinnatifid. ] (Bot.) Doubly pinnatifid. [ 1913 Webster ]
A bipinnatifid leaf is a pinnatifid leaf having its segments or divisions also pinnatifid. The primary divisions are pinnæ and the secondary pinnules. [ 1913 Webster ]
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 ]
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. [ 1913 Webster ]