Etymology

rhysimeter

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Today it means: An instrument, similar to a pitot tube, for measuring the velocity of a fluid current, the speed of a ship, etc. Full definition →

Ancient Greek ῥύσις
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The story

  1. Ancient Greek · derived fromῥύσις“flow”
  2. English todayrhysimeter

From Ancient Greek ῥύσις (rhúsis, “flow”) + -meter.

Etymology from Wiktionary, CC BY-SA 4.0.