aquarium

Aquarium can either describe a small tank, or an entire building that houses fish and other aquatic life. Your goldfish will probably feel right at home in the aquarium that's sitting on your desk, but a whale would be better off in a big aquarium where people buy tickets to see marine life.

An aquarium can be small enough to fit in the average house, or big enough to house whales and accommodate millions of tourists each year. If you're talking about more than one of those tanks filled with fish and other marine life, you could say aquariums, but aquaria, from the original Latin term, is also an acceptable plural.

Definitions of aquarium
  1. noun
    a tank or pool or bowl filled with water for keeping live fish and underwater animals
    synonyms: fish tank, marine museum
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    examples:
    Marineland
    a commercial aquarium featuring trained dolphins
    types:
    fish bowl, fishbowl, goldfish bowl
    a transparent bowl in which small fish are kept
    type of:
    storage tank, tank
    a large (usually metallic) vessel for holding gases or liquids
    vivarium
    an indoor enclosure for keeping and raising living animals and plants and observing them under natural conditions
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