[1] : The Collaborative International Dictionary of English v.0.48

eel \eel\, n. as. ?l; akin to d., g.,  dan. aal, icel. =all,
   sw. al. zo"ol.
   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.
   1913 webster
see also:
anguilla gymnotus vinegar eel conger eel electric eel 

[2] : WordNet (r) 2.0

eel
     n 1: the fatty flesh of eel; an elongate fish found in fresh
          water in europe and america; large eels are usually
          smoked or pickled
     2: voracious snakelike marine or freshwater fishes with smooth
        slimy usually scaleless skin and having a continuous
        vertical fin but no ventral fins

Eel >> E Words
Eel, definition of term: Eel
eel_pag1.html

Electric Eel >> E Words
Electric Eel, definition of term: Electric Eel
electric+eel_pag1.html