Etymology

cenosphere

C3E1N1O1S1P3H4E1R1E1

Today it means: A porous or hollow carbonaceous sphere-like particle formed during pyrolysis or in the course of the combustion of coal. Full definition →

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

  1. Proto-Hellenic*kenwós
  2. Ancient Greekκενός (kenós)
  3. Englishceno-
  4. Ancient Greekσφαῖρᾰ (sphaîră)
  5. Latinsphaera
  6. Late Latinsphēra
  7. Old Frenchsphere
  8. Middle Englishspere
  9. Englishsphere
  10. English todaycenosphere

From ceno- + -sphere.

Etymology from Wiktionary, CC BY-SA 4.0.