Medical Dictionary


noun vac·u·um \ˈvak-(ˌ)yüm, -y-əm, -yəm\
plural vac·u·ums or vac·ua \-yə-wə\

Medical Definition of VACUUM

:  emptiness of space
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
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