aquarium
Concise Oxford English Dictionary © 2008 Oxford University Press:
aquarium/əˈkweəriəm/
▶noun (pl. aquaria /-rɪə/ or aquariums) a transparent tank of water in which live fish and other water creatures and plants are kept.
– origin C19: from L., neut. of aquarius ‘of water’, on the pattern of vivarium.
'aquarium' also found in these Oxford entries:

