Meaning & use
Air cell
Last updated
A small cavity filled with air, especially the pocket of air found between the membranes at the blunt end of a bird's egg.
See it in a sentence
As the egg ages, moisture escapes through the shell and the air cell grows larger.
The mastoid air cells in the skull help lighten the bone and regulate air pressure near the ear.
A note on using this word
In candling eggs for freshness, a larger air cell indicates an older egg, since air cells expand as moisture evaporates over time.
Words with a similar meaning
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Another way to use it
2. noun
A cell in a battery that draws oxygen from the surrounding air as its active material, as in a zinc-air battery.
The hearing aid runs on a tiny zinc-air cell that activates once exposed to open air.
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