fish tank

noun

plural fish tanks

: a transparent usually acrylic or glass tank in which living aquatic animals or plants are kept

… And to my left is this fish tank, with these big-eyed, blinking, smiling, kind of bulbous-lipped fish that are kind of, like, curiously swimming up to the glass to check out the stranger in the office …

—Pedro Pascal, quoted at npr.com

… you'll immediately be greeted by an oversized, blue-lit seashell and neighboring saltwater fish tank, instantly evoking a seaside atmosphere.

—Todd Martens

compare aquarium

Word History

First Known Use

1810, in the meaning defined above