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Archimedes' principle

American  
[ahr-kuh-mee-deez prin-suh-puhl, ahr-kuh-mee-deez] / ˈɑr kəˈmi diz ˈprɪn sə pəl, ˌɑr kəˈmi diz /

noun

Physics.

  1. the law that a body immersed in a fluid is buoyed up by a force buoyant force, orbouyancy force equal to the weight of the fluid displaced by the body.

Archimedes' principle British  

noun

  1. a law of physics stating that the apparent upward force (buoyancy) of a body immersed in a fluid is equal to the weight of the displaced fluid

"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

Example Sentences

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Known as Archimedes' principle, as water is pushed away by an object, the water exerts a force back on the object that is equal to the object's weight.

From Scientific American

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.