upstroke
an upward stroke, especially of a pen or pencil, or of a piston in a vertical cylinder.
Origin of upstroke
1Words Nearby upstroke
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use upstroke in a sentence
The parts are in correct mechanical balance because two pistons are on the upstroke while the other two are descending.
Aviation Engines | Victor Wilfred PagThis is characterized by a long sweeping upstroke, and the recurving downstroke cuts the staff about in half.
Warren Commission (7 of 26): Hearings Vol. VII (of 15) | The President's Commission on the Assassination of President KennedyDuring the upstroke the cup collapses inwards and allows air to pass by it.
How it Works | Archibald WilliamsAfter the downstroke is completed, the teeth A will cut on the upstroke, the teeth B cutting on the downstroke, etc.
The Boy Mechanic, Book 2 | VariousDuring an upstroke this closes, and the other opens; the reverse happening during a downstroke.
How it Works | Archibald Williams
British Dictionary definitions for upstroke
/ (ˈʌpˌstrəʊk) /
an upward stroke or movement, as of a pen or brush
the mark produced by such a stroke
the upward movement of a piston in a reciprocating engine
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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