duckbill

Short definition from Wiktionary

Noun

1. 1
   The duck-billed platypus.
2. 2
   A hadrosaur.
3. 3
   A fish of the family Percophidae
4. 4
   A fish of the family Percophidae: Percophis brasiliensis (Brazilian flathead).
5. 5
   Bull ray (Aetomylaeus bovinus, now Pteromylaeus bovinus).
6. 6
   A device used to force padlocks.
7. 7
   A check valve with two or more flaps, usually shaped like a duck's beak, commonly used in medical applications to prevent contamination due to backflow.
8. 8
   A kind of surgical mask with a trapezoid pouch-like design with shortened or absent side edges.
9. 9
   A modern and more streamlined and tighter fitting version of a flat cap