DCHP-1 Online
blowing hole 
a breathing-hole in ice, made by seals.
- 1861 For the purpose of obtaining this necessary element [air], holes are kept open by the seals throughout the winter, and are called by the Esquimaux "blowing holes".
- 1921 Around the seal or blowing holes they [seals] were not in large numbers. . . .
- 1861 For the purpose of obtaining this necessary element [air], holes are kept open by the seals throughout the winter, and are called by the Esquimaux "blowing holes".