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Magdeburg hemisphere

American  

noun

Physics.

  1. one of a pair of hemispherical cups from which air can be evacuated when they are placed together: used to demonstrate the force of air pressure.

Etymology

Origin of Magdeburg hemisphere

After Magdeburg, where German statesman and physicist Otto von Guericke (1602–86) constructed a pair of such hemispheres

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.

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