"aquatic" in the noun sense
1. aquatic
a plant that lives in or on water
"aquatic" in the adjective sense
1. aquatic
relating to or consisting of or being in water
"an aquatic environment"
2. aquatic
operating or living or growing in water
"boats are aquatic vehicles"
"water lilies are aquatic plants"
"fish are aquatic animals"
Source: WordNet® (An amazing lexical database of English)
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