electroplaque
[ ih-lek-truh-plak ]
/ ɪˈlɛk trəˌplæk /
noun
(in certain fishes) one of a number of plates forming an electric organ, consisting of modified muscle tissue having an electric charge.
Also
e·lec·tro·plax
[ih-lek-truh-plaks] /ɪˈlɛk trəˌplæks/.