Entry 1 sense Webster, 1913 Gymnonoti /(jĭm`nō̇*nō"tī)/ · Gym·no·no·ti · IPA 01 n. pl. The order of fishes which includes the Gymnotus or electrical eel. The dorsal fin is wanting. 1. The order of fishes which includes the Gymnotus or electrical eel. The dorsal fin is wanting.(Zool.)