refugium
The English word “refugium” has 2 meanings listed here.
noun
- Any local environment that has escaped regional ecological change and therefore provides a habitat for endangered species.
- A separate section of a fishtank that shares the same water supply, used for denitrification, plankton production, etc.
Etymology
From Latin refugium. Doublet of refuge.
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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.