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magnetopause

[ mag-nee-tuh-pawz ]

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.


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Word History and Origins

Origin of magnetopause1

First recorded in 1960–65; magneto- + pause

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magnetoopticsmagnetoplasmadynamics