The Collaborative International Dictionary
vinegar eel
Eel \Eel\, n. [AS. ?l; akin to D., G., & Dan. aal, Icel. [=a]ll, Sw. [*a]l.] (Zo["o]l.) 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.
WordNet
vinegar eel
n. minute eelworm that feeds on organisms that cause fermentation in e.g. vinegar [syn: vinegar worm, Anguillula aceti, Turbatrix aceti]