a·quat·ic / əˈkwätik; əˈkwat-/ • adj. of or relating to water. ∎  (of a plant or animal) growing or living in or near water: the bay could support aquatic life. ∎  (of a sport) played in or on water. ∎  (of a store or dealer) specializing in products for ponds or aquariums.• n. 1. an aquatic plant or animal, typically one suitable for a pond or aquarium.2. (aquatics) sports played in or on water.

aquatic XV. — (O)F. aquatique or L. aquāticus, f. aqua water; see -ATIC.