noun
: any of numerous bottom-dwelling rays (family Torpedinidae) that are widely distributed in warm seas and have the anterior part of the body round and disklike, a short tail terminating in a rayed fin, and a pair of electric organs composed of modified pectoral muscles and occupying the lateral part of each side between the head and the pectoral fin: as
a. : a ray ( Tetranarce occidentalis ) of the eastern coast of No. America that attains a length of about five feet and is capable of giving a severe shock
b. : a somewhat smaller fish ( T. californica ) of the Pacific coast