1. a platypus, an egg-laying mammal with a broad flat bill resembling that of a duck
2. any of various other animals having a bill or snout resembling a duck’s bill
3. a type of protective face mask with a duck bill-like shape
Usage: medical

Examples

• The duckbill is one of only two mammals that lay eggs.
• We spotted a duckbill swimming in the Australian river.
• The duckbill dinosaur had a broad, flattened snout.
• Scientists studied the duckbill’s unique electroreception abilities.
• The nurse wore a duckbill mask during the procedure.
• Duckbills are found only in eastern Australia and Tasmania.