blowhole

1. The spiracle, on the top of the head, through which cetaceans breathe.

   Blasloch

   ды́халоdýxalo

2. A hole in sea ice where cetaceans and pinnipeds come to breathe.

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. A vent for the escape of steam or other gas.

   отду́шинаotdúšina, вентиляцио́нное отве́рстиеventiljaciónnoje otvérstije

   a hole for the escape of gas or air

5. An unintended cavity filled with air in a casting product.

   Lunker

6. A vertical opening in the top of a computer case that lets hot air (primarily from the CPU heat sink) escape quickly.

1. Nostrils and blowholes are homologous.

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