monimolimnion

The story

1. Ancient Greek · derived fromλῐ́μνη“lake”
2. Ancient Greek · derived fromμόνιμος“stable, permanent”
3. English todaymonimolimnion

From Ancient Greek μόνιμος (mónimos, “stable, permanent”) + -limnion (from Ancient Greek λῐ́μνη (lĭ́mnē, “lake”) + -ion), first appearing in the writings of British ecologist George Evelyn Hutchinson (1903–1991).

Words from the same roots

First known use, by meaning

• from 1930s The lower, dense stratum of a meromictic lake (one with permanently stratified layers) that does not mix with the waters above.