Etymology

hypolimnion

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Today it means: The perpetually cold layer of water that lies beneath the thermocline of a thermally stratified lake. Full definition →

English hypo- ← Ancient Greek ὑπο- (hupo-) ← Proto-Indo-European *upó
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The story

  1. Proto-Indo-European*upó
  2. Ancient Greekῠ̔πό (hŭpó)
  3. Ancient Greekὑπο- (hupo-)
  4. Englishhypo-
  5. English todayhypolimnion

From hypo- + -limnion.

Etymology from Wiktionary, CC BY-SA 4.0.