‖n. pl. [ NL., from Gr. &unr_; twisted (fr. &unr_; to plait, twist) + &unr_; jaw. ] (Zool.) An order of fishes generally having the maxillary bone united with the premaxillary, and the articular united with the dentary. [ 1913 Webster ]

☞ The upper jaw is immovably joined to the skull; the ventral fins are rudimentary or wanting; and the body is covered with bony plates, spines, or small rough ossicles, like shagreen. The order includes the diodons, filefishes, globefishes, and trunkfishes. [ 1913 Webster ]

{ } a. (Zool.) Of or pertaining to the Plectognathi. [ 1913 Webster ]