gymnotus

‖n. [ NL., fr. Gr. gymno`s naked + nw^tos the back: cf. F. gymnote. ] (Zool.) A genus of South American fresh-water fishes, including the Gymnotus electricus, or electric eel. It has a greenish, eel-like body, and is possessed of electric power. [ 1913 Webster ]

One fearful shock, fearful but momentary, like that from the electric blow of the gymnotus. De Quincey. [ 1913 Webster ]