plural of air admittance vent

(architecture) Louvres or strips of wood or metal used as windbreaks that allow light and air in, often seen in belfries. / A sloping roof. / A metal chimney cap.

a hot spring, on the floor of the ocean, mostly along the central axes of the mid-ocean ridges, where heated fluids emerge from fissures in the Earth's crust.

An opening, possibly covered by a grate or grill, possibly ducted, that allows air to circulate. / A device or valve that allows to air to be evacuated from a radiator or pipe in a heating system.

A vertical pipe that provides ventilation to a building's drainage system

(construction) A ventilator located at the ridge that allows the escape of warm and/or moist air from the attic area or rafter cavity.

(roofing) The practice of providing regularly spaced or continuously protected openings along a roof edge or perimeter, used as part of a ventilation system to dissipate heat and moisture vapor.

An abnormal behaviour of birds, primarily commercial egg-laying hens, characterised by pecking damage to the cloaca, the surrounding skin and underlying tissue.

(volcanology, geology) A volcanic vent from which lava flows, with minimal explosive activity; characteristic of shield volcanoes.

To utter; to produce (a sound). / To express (an emotion, opinion, etc.).