A chamber or hole filled up with atmosphere in an animal or plant
- A chamber or hole full of air, in an animal or plant.
- A cavity containing air to do something as a spring for equalizing the movement of a fluid in a pump or other hydraulic device.
A chamber or cavity full of atmosphere, in an animal or plant.
- A cavity containing environment to do something as a spring for equalizing the flow of a liquid in a pump or any other hydraulic machine.
The amount of watery vapour in the air passing through a stoma has no effect upon it, as the surfaces of the guard cells abutting on the air chamber are strongly cuticularized, and therefore impermeable.