The Collaborative International Dictionary
Birostrate
Birostrate \Bi*ros`trate\, Birostrated \Bi*ros"tra*ted\, a. Having a double beak, or two processes resembling beaks.
The capsule is bilocular and birostrated.
--Ed. Encyc.
Wiktionary
birostrate
a. (context rare English) Having two beaks (or beak-like structures)