syngnathi

from The Century Dictionary.

• In ichthyology, a suborder of lopho branch fishes having a fistulous snout and no ventral fins, as the pipe-fishes, sea-horses, and related forms. See Hippocampidæ, Syngnathidæ.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Zoöl.) 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.