a. Bot. [f. BI- pref.2 3 + PINNATIFID.] Of leaves: Pinnatifid, with the primary lobes or pinnæ themselves similarly divided. So Bipinnatiparted, -partite, Bipinnatisect, -sected.
1830. Lindley, Nat. Syst. Bot., 83. Leaves … sinuate-pinnatifid, or bipinnatifid.
1870. Bentley, Bot., 153. If the divisions are themselves divided in a similar manner to the lamina itself, the leaf is said to be bipinnatifid, bipinnatipartite, or bipinnatisected.
