Source : Webster's Revised Unabridged Dictionary (1913)

Syngnathi \Syng"na*thi\, n. pl. [NL., fr. Gr. sy`n with + ?
   jaw.] (Zo["o]l.)
   A suborder of lophobranch fishes which have an elongated
   snout and lack the ventral and first dorsal fins. The
   pipefishes and sea horses are examples. -- {Syng"na*thous},
   a.