a. Zool. [f. mod.L. Syngnathus (f. Gr. σύν SYN- + γνάθος jaw) + -OUS.] Belonging to the genus Syngnathus or suborder Syngnathi of fishes, characterized by the jaws being united into a tubular snout, and including the pipe-fishes and sea-horses.
1871. Darwin, Desc. Man, I. vi. 210. The males of syngnathous fishes receive the eggs of the females in their abdominal pouches.
