By extension, a process in which other gases (such as carbon dioxide or nitrogen or argon) are circulated through or mixed with a substance (usually liquid), sometimes with the consequence of increasing the transfer of air into the same liquid at the surface due to the induced circulation.
The process by which air is circulated through or mixed with a substance such as soil or a liquid.
Any similar process in an organism that lacks lungs that exchanges gases with its environment.
An act of breathing; a breath.
The process of inhaling and exhaling; breathing, breath.
The process by which cells obtain chemical energy by the consumption of oxygen and the release of carbon dioxide.