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magnetopause

American  
[mag-nee-tuh-pawz] / mægˈni təˌpɔz /

noun

Astronomy.

  1. the boundary between the earth's magnetosphere and interplanetary space, about 40,000 miles (65,000 km) above the earth, marked by an abrupt decrease in the earth's magnetic induction.

  2. a similar feature of some other planet.

Etymology

Origin of magnetopause

First recorded in 1960–65; magneto- + pause

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.