Etymology

ozonosphere

O1Z10O1N1O1S1P3H4E1R1E1

Today it means: A layer in part of the stratosphere that has a larger than normal concentration of ozone; the ozone layer. Full definition →

English sphere ← Middle English spere ← Old French sphere
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The story

  1. Englishozone
  2. Ancient Greekσφαῖρᾰ (sphaîră)
  3. Latinsphaera
  4. Late Latinsphēra
  5. Old Frenchsphere
  6. Middle Englishspere
  7. Englishsphere
  8. English todayozonosphere

From ozone + -o- + -sphere.

Etymology from Wiktionary, CC BY-SA 4.0.