upstroke

[ uhp-strohk ]

noun

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

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

Word History and Origins

Origin of upstroke¹

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

Example Sentences

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

From Project Gutenberg

This is characterized by a long sweeping upstroke, and the recurving downstroke cuts the staff about in half.

From Project Gutenberg

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

From Project Gutenberg

After the downstroke is completed, the teeth A will cut on the upstroke, the teeth B cutting on the downstroke, etc.

From Project Gutenberg

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

From Project Gutenberg