Etymology

rhizosphere

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Today it means: The soil region subject to the influence of plant roots and their associated microorganisms. Full definition →

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

  1. Proto-Indo-European*wréh₂ds
  2. Ancient Greekῥῐ́ζᾰ (rhĭ́ză)
  3. Englishrhizo-
  4. Ancient Greekσφαῖρᾰ (sphaîră)
  5. Latinsphaera
  6. Late Latinsphēra
  7. Old Frenchsphere
  8. Middle Englishspere
  9. Englishsphere
  10. English todayrhizosphere

From rhizo- + -sphere.

Etymology from Wiktionary, CC BY-SA 4.0.