BLOWHOLES

Noun

blowholes

plural of blowhole

Verb

blowholes

Third-person singular simple present indicative form of blowhole

Source: Wiktionary

BLOWHOLE

Blow"hole`, n.

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.

Note: There are two spiracles or blowholes in the common whales, but only one in sperm whales, porpoises, etc.

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

4. (Founding)

Definition: An air hole in a casting.

Source: Webster’s Unabridged Dictionary 1913 Edition