air hole
Opening for ventilation
An air hole is an opening that allows air to pass through—for ventilation, breathing, or pressure equalization.
Ice fishermen cut air holes; shipping crates have air holes punched in them.
In aviation, an air hole is an informal term for a pocket of thin air that causes a plane to drop suddenly: We hit an air hole and my coffee went everywhere.
vent
Opening for airflow
perforation · crack · puncture · leak · defect · bubble · casting · flaw · mold · cavity
snorkel
Underwater breathing pipe
seal · diving · surface · oxygen · respiration · suffocation · gasp · emerge · mammal · arctic
- drum kitsnare drum, bass drum, kick drum, hi-hat, ride cymbal
- burrowsburrow, rabbit warren, tunnel, warren, fox den
- openingsopening, aperture, gap, slit, crack
permeability/ventilation
air holeseal
Authentication stamp or mark
airtight seal · hermetic seal · blockage · obstruction · closure