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epilimnion Line breaks: epi|lim¦nion
Pronunciation: /ˌɛpɪˈlɪmnɪən/

Definition of epilimnion in English:

noun (plural epilimnia ˌɛpɪˈlɪmnɪə)

The upper layer of water in a stratified lake.
Example sentences
  • The chemistry of the two parts of a freshwater lake, the epilimnion and the hypolimnion, is affected by biological processes and by circulation.
  • The amount of bacterial cells imported via the inlets in relation to bacterioplankton cells produced in the epilimnion of the lakes was also determined.
  • At each pond, we took two replicate water samples from the epilimnion using an integrated depth sampler; we took samples from the surface to 1.25 m in Monday Bog and to 1.75 m in Wednesday Bog.


Early 20th century: from epi- 'above' + Greek limnion (diminutive of limnē 'lake').

Words that rhyme with epilimnion


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