blowhole

blowhole is a   Noun

Definition:

[1] A cavern in a cliff, at the water level, opening to the air at its farther extremity, so that the waters rush in with each surge and rise in a lofty jet from the extremity.

[2] A nostril or spiracle in the top of the head of a whale or other cetacean.

[3] A hole in the ice to which whales, seals, etc., come to breathe.

[4] An air hole in a casting.

Synonyms: