an apparatus or device employing suction.
Hydraulics. a suction pump that operates by the pressure differential created by the high-speed flow of a fluid past an intake orifice.
Medicine/Medical. an instrument for removing body fluids by suction.

1860–65; aspirate + -or2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
aspirator (ˈæspɪˌreɪtə)
a device employing suction, such as a jet pump or one for removing fluids from a body cavity

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

aspirator as·pi·ra·tor (ās'pə-rā'tər)
An apparatus for removing fluid from a body cavity, consisting usually of a hollow needle and a cannula, connected by tubing to a container in which a vacuum is created by a syringe or a suction pump.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
After emptying the traps, he spent three minutes around each one, sucking up live ants with the aspirator.
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