The lowest layer in a thermally stratified lake or reservoir. This layer consists of colder, more dense water, has a constant temperature and no mixing occurs.
HYPOLIMNION (HI-POE-LIM-KNEE-ON)
Meaning of HYPOLIMNION (HI-POE-LIM-KNEE-ON) in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012