To treat with ozone.
An allotrope of oxygen (symbol O₃) having three atoms in the molecule instead of the usual two; it is a toxic gas, generated from oxygen by electrical discharge.
Hypernym: greenhouse gas
Fresh air, especially that breathed at the seaside and smelling of seaweed.
To ventilate; to use a ventilator; to use ventilation.
To allow gases to escape.
To determine the sex of (a chick) by opening up the anal vent or cloaca.
To express a strong emotion.
To snuff; to breathe or puff out; to snort.
To sell; to vend.
To allow to escape through a vent.
An opening in a volcano from which lava or gas flows.
Opportunity of escape or passage from confinement or privacy; outlet.
A small aperture.
The opening at the breech of a firearm, through which fire is communicated to the powder of the charge.
Ventriloquism.
A slit in the seam of a garment.
Emission; escape; passage to notice or expression; publication; utterance.
An opening through which gases, especially air, can pass.
The excretory opening of lower orders of vertebrates.
A rant; a long session of expressing verbal frustration.
In steam boilers, a sectional area of the passage for gases divided by the length of the same passage in feet.