DCHP-1 Online
breathing-hole 
n. an opening in the ice, made as a breathing-hole by some animal.
See also: air-hole (def. 2)
- 1854 (1892) The seal are shot lying by their . . . breathing-holes.
- 1937 It is only when the sea is in a frozen state that the natives live upon its surface and subsist upon the seals they procure through the breathing holes.
- 1964 Fewer Eskimos now could track down the breathing holes of the seals in the ice. . . .
- 1854 (1892) The seal are shot lying by their . . . breathing-holes.