Etymology

exosporium

E1X8O1S1P3O1R1I1U1M3

Today it means: The outer layer of a pollen grain or spore; the exine. Full definition →

English spore ← Ancient Greek ἔξω (éxō)
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The story

  1. Ancient Greekἐκ (ek)
  2. Ancient Greekἔξω (éxō)
  3. Englishexo-
  4. Englishspore
  5. English todayexosporium

From exo- + spore + -ium.

Etymology from Wiktionary, CC BY-SA 4.0.