upstroke

[ uhp-strohk ]

noun
  1. an upward stroke, especially of a pen or pencil, or of a piston in a vertical cylinder.

Origin of upstroke

1
First recorded in 1820–30; up- + stroke1

Words 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 Pag
  • This 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 Kennedy
  • During the upstroke the cup collapses inwards and allows air to pass by it.

    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 an upstroke this closes, and the other opens; the reverse happening during a downstroke.

    How it Works | Archibald Williams

British Dictionary definitions for upstroke

upstroke

/ (ˈʌpˌstrəʊk) /


noun
    • an upward stroke or movement, as of a pen or brush

    • the mark produced by such a stroke

  1. 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