Webster's Revised Unabridged Dictionary · 1913

Eel

Eel , noun

[Anglo-Saxon {not transcribed}l; akin to Dutch, German, & Danish aal, Icelandic āll, Swedish ål.]

(Zoology) An elongated fish of many genera and species. The common eels of Europe and America belong to the genus Anguilla. The electrical eel is a species of Gymnotus. The so called vinegar eel is a minute nematode worm. See Conger eel, Electric eel, and Gymnotus.