torpedo (n.)youdaoicibaDictYouDict
1520s, "electric ray" (flat fish that produces an electric charge to stun prey or for defense), from Latin torpedo "electric ray," originally "numbness, sluggishness" (the fish so called from the effect of being jolted by the ray's electric discharges), from torpere "be numb" (see torpor).
Torpedo. A fish which while alive, if touched even with a long stick, benumbs the hand that so touches it, but when dead is eaten safely. [Johnson]
The sense of "explosive device used to blow up enemy ships" is first recorded 1776, as a floating mine; the self-propelled version is from c. 1900. Related: Torpedic.
electrostaticyoudaoicibaDictYouDict
"Relating to stationary electric charges or fields as opposed to electric currents", Mid 19th century: from electro- + static, on the pattern of hydrostatic.
faradayyoudaoicibaDictYouDict
"A unit of electric charge equal to Faraday’s constant", Early 20th century: coined in German from the name of Faraday, Michael.