Definitions from Wiktionary ( )

▸ noun:  Any freshwater fish of the order Anguilliformes, which are elongated and resemble snakes.
▸ noun:  A European eel (Anguilla anguilla).
▸ noun:  Various animals that resemble true eels:
▸ noun:  Other ray-finned fishes:
▸ noun:  An electric eel (any knifefish of genus Electrophorus)
▸ noun:  In order Synbranchiformes:
▸ noun:  A swamp eel (any fish in family Synbranchidae).
▸ noun:  An earthworm eel, also called the spineless eel (any fish in family Chaudhuriidae).
▸ noun:  A spiny eel (any fish in family Mastacembelidae).
▸ noun:  A deep-sea spiny eel (any fish in family Notacanthidae).
▸ noun:  Certain amphibians:
▸ noun:  A conger eel, also called the Congo eel, amphiuma, and Congo snake (any salamander of genus Amphiuma).
▸ noun:  A two-legged eel, also called the mud eel and lesser siren, Siren intermedia.
▸ noun:  A leopard eel, also called the leopard siren and reticulated siren, Siren reticulata.
▸ noun:  A rubber eel, Typhlonectes natans.
▸ noun:  A vinegar eel, a roundworm of species Turbatrix aceti.
▸ noun:  Someone or something that is sneaky and/or hard to catch.
▸ verb:  (intransitive) To fish for eels.
▸ verb:  (intransitive) To move with a sinuous motion like that of an eel.

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