| Vacuum (vacuum) |
|---|
| n. | (?) |
|---|
| Vac"u*um |
| ; pl. E.
Vacuums (# |
A space entirely devoid of matter (called also, by
way of distinction, absolute vacuum); hence, in a more general
sense, a space, as the interior of a closed vessel, which has been
exhausted to a high or the highest degree by an air pump or other
artificial means; as, water boils at a reduced temperature in a
vacuum.
The condition of rarefaction, or reduction of
pressure below that of the atmosphere, in a vessel, as the condenser of a
steam engine, which is nearly exhausted of air or steam, etc.; as, a
vacuum of 26 inches of mercury, or 13 pounds per square
inch.
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