Etymology

sillometer

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Today it means: A 19th-century device for measuring the speed of a ship without using a log-line. Full definition →

French siller
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The story

  1. French · borrowed fromsiller“to make way”
  2. English todaysillometer

Borrowed from French siller (“to make way”) + -meter.

Etymology from Wiktionary, CC BY-SA 4.0.