The seeping of fluid into a body cavity; the fluid itself.
Process of gases passing through a hole or holes considerably smaller than the mean free path of the gas molecules.
An outpouring of speech or emotion.
A liquid outpouring.
Any small aperture or vent for air or other fluid.
A pore or opening used (especially by arthropods and some fish) for respiration.
The blowhole of a whale, dolphin or other similar species.