vacuum

vacuum
An empty space, one practically exhausted of air or gas. [L. ntr. of vacuus, empty]

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vac·u·um 'vak-(.)yüm, -yu̇-əm, -yəm n, pl vac·u·ums or vac·ua -yə-wə
1) emptiness of space
2 a) a space absolutely devoid of matter
b) a space partially exhausted (as to the highest degree possible) by artificial means (as an air pump)
c) a degree of rarefaction below atmospheric pressure: negative pressure
vacuum adj
1) of, containing, producing, or utilizing a partial vacuum <separated by means of \vacuum distillation>
2) of or relating to a vacuum device or system

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vac·u·um (vakґūm) [L.] a space devoid of air or of other gas; a space from which the air has been exhausted.

Medical dictionary. 2011.

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