pulsator
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pul·sa·tor
(pŭl′sā′tər, pŭl-sā′-)n.
A pulsating device or machine.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
pulsator
(pʌlˈseɪtə)n
1. (Mechanical Engineering) a device that stimulates rhythmic motion of a body; a vibrator
2. (Mechanical Engineering) any pulsating machine, device, or part
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014