Protonosphere

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Synonym of geocorona; a layer of the atmosphere. uncountable
  2. 2
    Analogs of the geocorona countable

Synonyms

All synonyms
geocorona

Etymology

From 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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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.