blowhole
/B L OW1 HH OW0 L/noun
- 1
The spiracle, on the top of the head, through which cetaceans breathe.
- 2
A vent for the escape of gas.
- 3
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.
- 4
An unintended cavity filled with air in a casting product.
- 5
A vertical opening in the top of computer cases, that let hot air, primarily from the CPU heat sink, escape quickly.
verb
- 1
To fill or be filled with air in an unintended cavity.
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