Webster’s Revised Unabridged Dictionary · 1913
Lepidosiren
Lep′i·do·si′ren (-sī′rĕn), n. [Gr. λεπίς -ίδος, a scale + σειρήν a siren.] (Zoöl.) An eel-shaped ganoid fish of the order Dipnoi, having both gills and lungs. It inhabits the rivers of South America. The name is also applied to a related African species (Protopterus annectens). The lepidosirens grow to a length of from four to six feet. Called also doko.