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An inward stroke, especially a piston stroke moving away from the crankshaft.
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.
an inward stroke; esp in an engine, the stroke that moves the piston away from the crankshaft
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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|Noun||1.||instroke - the stroke of an engine piston moving away from the crankshaft|
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