up·​stroke | \ ˈəp-ˌstrōk How to pronounce upstroke (audio) \

Definition of upstroke

: a stroke (as of a pen) made in an upward direction

Examples of upstroke in a Sentence

Recent Examples on the Web During a wing upstroke, for instance, air can filter through the wing to propel it upward. Courtney Linder, Popular Mechanics, "Drones Are Cool, But Robot Birds Are Better," 9 July 2020 Breast: Archaeopteryx lacked the modern bird’s prominent breastbone, which anchors flight muscles and guides the tendons that facilitate a rapid upstroke. Jonathon Keats, Discover Magazine, "The Origins of Flight, From Birds to Bugs to Planes," 21 June 2019 The sideways orientation of the Archaeopteryx shoulder allowed flapping, but limited the upstroke. Jonathon Keats, Discover Magazine, "The Origins of Flight, From Birds to Bugs to Planes," 21 June 2019 Pedal cages add power on the upstroke to improve pedaling efficiency. Popular Mechanics, "DIY Commuter Bike Mods," 27 Aug. 2010 A hydrodynamic analysis of the humpback's movements in the lab confirmed that both the upstroke and the downstroke of its flippers provide forward thrust. Carrie Arnold, National Geographic, "Rare Video Captures Never-Before-Seen Whale Behavior," 12 July 2017 Clip-ins are cycling shoes that connect to a bike's pedals via little metal or plastic cleats so that the rider can use leg power on the upstroke as well as the downstroke. Jacqueline Detwiler, Popular Mechanics, "Why Gravel Cycling Is Terrifying—And Exhilarating," 6 Mar. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'upstroke.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of upstroke

1828, in the meaning defined above

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The first known use of upstroke was in 1828

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Cite this Entry

“Upstroke.” Dictionary, Merriam-Webster, Accessed 23 Jan. 2021.

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