Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of acanthopterygii is as below...

Acanthopterygii :: Acanthopterygii (n. pl.) An order of fishes having some of the rays of the dorsal, ventral, and anal fins unarticulated and spinelike, as the perch..

Acanthopteri :: Acanthopteri (n. pl.) A group of teleostean fishes having spiny fins. See Acanthopterygii.

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