Noun | 1. | Synentognathi - order of fishes having spineless fins; needlefishes; sauries; flying fishes; halfbeaks animal order - the order of animals subclass Teleostei, Teleostei - large diverse group of bony fishes; includes most living species Belonidae, family Belonidae - ferocious fishes of warm regions resembling but unrelated to the freshwater gars Exocoetidae, family Exocoetidae - flying fishes; closely related to the halfbeaks family Hemiramphidae, Hemiramphidae - halfbeaks; marine and freshwater fishes closely related to the flying fishes but not able to glide |