a. [f. BI- pref.2 3 + SERRATE, ad. L. serrātus notched like a saw, f. serra saw.] Notched like a saw, with the notches themselves similarly minutely notched.
1835. Lindley, Introd. Bot., II. 358. When these teeth are themselves serrate, we say biserrate.
1870. Bentley, Bot., 252.
