cutlass fish, cutlassfish n.
 1. Zool. a peculiar, long, thin, marine fish (Trichiurus lepturus) of the southern United States and West Indies, having a long whiplike scaleless body and sharp daggerlike teeth; -- called also frostfish, saber fish, silver eel, and, improperly, swordfish; also, several related members of the genus Trichiurus.  It is closely related to snake mackerel.
 Syn: -- frost fish, frostfish, hairtail.

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 cutlassfish
      n : long-bodied marine fishes having a long whiplike scaleless
          body and sharp teeth; closely related to snake mackerel
          [syn: frost fish, hairtail]