nAcanthopterygiiteleost fishes having fins with sharp bony rays
Webster's Revised Unabridged Dictionary
n. plAcanthopterygii(Zoöl) An order of fishes having some of the rays of the dorsal, ventral, and anal fins unarticulated and spinelike, as the perch.
Century Dictionary and Cyclopedia
acanthopterygiiA large group of fishes to which various limits and values have been assigned. The name was introduced into systematic ichthyology by Willughby and Ray, adopted by Artedi, and largely used by subsequent naturalists. In Cuvier's system of classification, the first order of fishes, characterized by hard spiny rays in the dorsal fins, as the common perch, bass, and mackerel; the spiny-finned fishes. In Günther's system of classification, an order of teleosts with part of the rays of the dorsal, anal, and ventral fins spiny, and the lower pharyngeals separate. The last character eliminates the labrids and several other families retained by Cuvier, but by Gunther referred to a special order Pharyngognathi. In Gill's system of classification, a suborder of Teleocephali with ventrals thoracic or jugular (sometimes suppressed), spines generally in the anterior portion of the dorsal and anal fins and to the outer edges of the ventrals, normal symmetrical head, and pharyngeal bones either separate or united. The pediculate, hemibranchiate, and opisthomous fishes are excluded as different orders, and the Percesoces, Rhegnopteri, Discocephali, Tæniosomi, and Xenopterygii as special suborders. Even thus limited, it comprises more species than any other suborder or order of fishes. The perch, bass, porgy, mackerel, and swordfish are examples.