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upstroke

[uhp-strohk] /ˈʌpˌstroʊk/
noun
1.
an upward stroke, especially of a pen or pencil, or of a piston in a vertical cylinder.
Origin of upstroke
1820-1830
First recorded in 1820-30; up- + stroke1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for upstroke
Historical Examples
  • Her axe shone, on the upstroke, on the downstroke, as she hacked at his hand.

    The Were-Wolf

    Clemence Housman
  • The parts are in correct mechanical balance because two pistons are on the upstroke while the other two are descending.

    Aviation Engines

    Victor Wilfred Pag
  • During an upstroke this closes, and the other opens; the reverse happening during a downstroke.

    How it Works Archibald Williams
  • After the downstroke is completed, the teeth A will cut on the upstroke, the teeth B cutting on the downstroke, etc.

  • During the upstroke the cup collapses inwards and allows air to pass by it.

    How it Works Archibald Williams
  • The stroke on the left side of that capital is first a down stroke, which is almost exactly retracted by an upstroke.

    Warren Commission (4 of 26): Hearings Vol. IV (of 15) The President's Commission on the Assassination of President Kennedy
  • We have a downstroke on the left side of the letter which is almost exactly retracted by the upstroke.

    Warren Commission (4 of 26): Hearings Vol. IV (of 15) The President's Commission on the Assassination of President Kennedy
British Dictionary definitions for upstroke

upstroke

/ˈʌpˌstrəʊk/
noun
1.
  1. an upward stroke or movement, as of a pen or brush
  2. the mark produced by such a stroke
2.
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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Word Value for upstroke

14
16
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