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..
Acanthopterygious :: Acanthopterygious (a.) Having fins in which the rays are hard and spinelike; spiny-finned.
Acanthus :: Acanthus (n.) A genus of herbaceous prickly plants, found in the south of Europe, Asia Minor, and India; bear's-breech..
Acanthus :: Acanthus (n.) An ornament resembling the foliage or leaves of the acanthus (Acanthus spinosus); -- used in the capitals of the Corinthian and Composite orders.