| 释义 |
duck's bill
The bill of a duck. Applied a. to certain instruments of this shape, chiefly in surgery. Also attrib.
1601Manningham Diary Feb. (Camden) 23 They grope for the stone [in the bladder] with an other toole which they call a duckes bill. 1676Wiseman Chirurg. Treat. 314, I took hold of it with a Forceps Ducks bills. 1794Rigging & Seamanship I. 4 Cleats..the thin end is shaped with a duck's bill. Ibid. 28 The lower ends are..thinned with a duck's-bill shape.
b. Printing. A tongue cut in a piece of stout paper and pasted on at the bottom of the tympan sheet.
c. Comb., as duck's-bill bit, a form of bit for use in a brace in wood-boring; duck's-bill limpet, a limpet of the genus Parmophorus. |