airhole
Gap for breath
An airhole is an opening that allows air to pass through—for ventilation, breathing, or pressure equalization.
Ice fishermen cut airholes; animals trapped underwater seek them.
Airholes in packaging prevent suffocation.
In aeronautics, an airhole is an air pocket that causes sudden drops in altitude.
Gas exchange in organisms
- inhaleDraw air in
- exhaleExpel breath outward
- oxygenElement eight, colorless gas
- lungsRespiratory chest organs
snorkel · gills · trachea · blowhole · nostril · gasp · suffocate · trapped
Adjustable optical inlet
- orificeBodily passage entrance
- perforationHole punched through something
- punctureHole from penetration
- gapUnfilled space between
slit · pore · inlet · outlet · breach · crack · fissure · pinhole
Opening for airflow
- ductTube conveying fluid
- grateFramework of metal bars
- louvreAngled-slat ventilation opening
- exhaustUse up entirely
circulation · airflow · draft · cooling · intake · outlet · grille · register
Air-filled film sphere
- voidWithout legal effect
- castingShaping through liquid form
- concreteSolid building mixture
- weldHeat-fused metal joint
flaw · porosity · imperfection · molding · ceramic · glass · pottery · kiln
Tanned animal skin
- shoeCovering for feet
- garmentArticle of clothing
- perforationHole punched through something
- breathabilityAirflow through material
eyelet · punch · ventilated · cooling · oxford · brogue · tongue · insole
respiration
Gas exchange in organisms
lungs · snorkel · gills · trachea · blowhole · nostril · gasp · suffocate · trapped · pocket
aperture
Adjustable optical inlet
- orificeBodily passage entrance
- perforationHole punched through something
- punctureHole from penetration
gap · slit · pore · inlet · outlet · breach · crack · fissure · pinhole · cavity
vent
Opening for airflow
exhaust · circulation · airflow · draft · cooling · intake · outlet · grille · register · HVAC
bubble
Air-filled film sphere
weld · flaw · porosity · imperfection · molding · ceramic · glass · pottery · kiln · trapped
leather
Tanned animal skin
- shoeCovering for feet
- garmentArticle of clothing
- perforationHole punched through something
breathability · eyelet · punch · ventilated · cooling · oxford · brogue · tongue · insole · upper
auger
Spiral hole-maker
jigging · perch · walleye · pike · trout · angler · tip-up · skimmer · shelter · frozen
airholeairtight seal
Impermeable boundary preventing airflow
hermetic seal · seal · blockage · sealed shut · obstruction