Early 19th century; earliest use found in John Loudon (1783–1843), landscape gardener and horticultural writer. From classical Latin rāna frog + -arium, after herbarium, vivarium, etc.
Definition of ranarium in US English:
ranarium
nounrəˈnɛːrɪəm
A place for keeping and breeding frogs.
Origin
Early 19th century; earliest use found in John Loudon (1783–1843), landscape gardener and horticultural writer. From classical Latin rāna frog + -arium, after herbarium, vivarium, etc.