the.com/vivarium

means An enclosed space — tank, terrarium, or glassed room — built to keep living animals or plants under controlled conditions resembling their natural habitat.

from Straight from Latin vivarium, 'a place for keeping live animals,' built from vivus, 'alive' — the same root that gives English 'vivid' and 'survive.' Ancient Romans used the word for fish ponds and game preserves on their estates, long before the glass tanks and heat lamps; the term simply migrated indoors as 'keeping things alive' got smaller and more personal.