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isochasm

[ ahy-suh-kaz-uhm ]

noun

, Meteorology.
  1. a line on a map or chart connecting points where auroras are observed with equal frequency.

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Other Words From

  • iso·chasmic adjective

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Word History and Origins

Origin of isochasm1

First recorded in 1880–85; iso- + chasm

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isoceraunicisocheim

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