blowhole

Meanings

Noun

• The spiracle, on the top of the head, through which cetaceans breathe.
• A vent for the escape of gas.
• A top-facing opening to a cavity in the ground very near an ocean's shore, leading to a marine cave from which wave water or bursts of air are expelled.
• An unintended cavity filled with air in a casting product.
• A vertical opening in the top of computer cases, that let hot air, primarily from the CPU heat sink, escape quickly.

Verb

• To fill or be filled with air in an unintended cavity.

Origin

• blow + hole