Dictionary
fis•si•ros•tral
Pronunciation: (fis"u-ros'trul), [key]—
adj. Ornith.
1. having a broad, deeply cleft beak or bill, as the swallows and goatsuckers.
2. (of the bill) deeply cleft.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.