Definitions for: Blowhole


[n] a hole for the escape of gas or air
[n] the spiracle of a cetacean located far back on the skull



Webster (1913) Definition: 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) An air hole in a casting.

Synonyms: vent, venthole

See Also: air duct, air passage, airway, blower, cetacean, cetacean mammal, hole, smoke hole, spiracle

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