evacuate

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evacuate

[i′vak·yə‚wāt]
(science and technology)
To remove something, especially gases and vapors, from an enclosure, such as from the envelope of an electron tube, or from a well. Also known as exhaust.
References in periodicals archive ?
Cameron beheld on the magnified retina of Lenoir's eye "The bestial figure of a negro." Dixon's expatiation on race within this scene marks how the sign "negro" is at once radically demonstrative (telling/testamentary) and evacuative (shares nothing/empties out meaning).
In some sense residing at the opposite dietetic pole of food intake, phlebotomy was an evacuative technique (along with purging, blistering, and the giving of clysters) that constituted a normative part of dietetic regimen.