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Etymology edit

proton +‎ -o- +‎ -sphere. From the content of this layer of the atmosphere being primarily protons (positively ionized protium isotope of hydrogen)

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Noun edit

protonosphere (plural protonospheres)

  1. (Earth's atmosphere, chiefly uncountable) Synonym of geocorona; a layer of the atmosphere.
  2. (meteorology, plasma physics, space physics, countable) Analogs of the geocorona

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