1. A tank, a vessel, or a collection of such for aquatic plants and animals.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• aquerium,
• acquariums,
• quarum,
• aquarious,
• aquarias,
• aquarim,
• aquaruim,
• aqurium,
• aquarum,
• aqaurium,
• aquariume,
• aquariams,
• aquaris,
• aquariam,
• acuariam,
• aquarian,
• aquarism,
• aquairum,
• aquaria,
• acquarium

The adjective form of the word "aquarium" is "aquatic".

The plural of the "aquarium" can be the "aquariums".

The singular of the "aquarium" can be the "aquarium".