plural of abat-vent

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

plural of fissure vent

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

(firearms) In a breechloading firearm, a vertical sliding block with a conical plug on its front surface to seal the firing chamber and close the breech.

plural of vent-piece

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 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.

plural of air 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.