Actually it is Torpedo .. no e on the end like tomatoe.
as reference :
http://www.hyperdictionary.com/dictionary/torpedoTORPEDO: Dictionary Entry and Meaning
Pronunciation:    tor'peedow 
Matching Terms:    Torpedinidae, Torpediniformes, Torpedinous, torpedo boat, Torpedo body, Torpedo boom, Torpedo catcher, Torpedo shell, Torpedo station, Torpedo stern, torpedo tube, torpedo-boat destroyer, Torpedoist 
WordNet Dictionary   
  Definition:   [n]  any sluggish bottom-dwelling ray of the order Torpediniformes having a rounded body and electric organs on each side of the head capable of emitting strong electric discharges 
[n]  armament consisting of a long cylindrical self-propelled underwater projectile that detonates on contact with a target 
[n]  a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States 
[n]  a professional killer who uses a gun 
[v]  attack or hit with torpedoes    
  Synonyms:   bomber, crampfish, Cuban sandwich, electric ray, grinder, gun, gunman, gunslinger, hero, hero sandwich, hired gun, hit man, hoagie, hoagy, Italian sandwich, numbfish, poor boy, shooter, sub, submarine, submarine sandwich, triggerman, wedge, zep   
  See Also:   aerial torpedo, armament, assail, attack, bangalore torpedo, family Torpedinidae, homing torpedo, liquidator, manslayer, murderer, ray, sandwich, submarine torpedo, Torpedinidae    
Webster's 1913 Dictionary   
  Definition:   \Tor*pe"do\, n.
An automobile with a torpedo body. [Cant]
\Tor*pe"do\, n.; pl. {Torpedoes}. [L. torpedo, -inis,
from torpere to be stiff, numb, or torpid. See {Torpid}.]
1. (Zo["o]l.) Any one of numerous species of elasmobranch
   fishes belonging to {Torpedo} and allied genera. They are
   related to the rays, but have the power of giving
   electrical shocks. Called also {crampfish}, and
   {numbfish}. See {Electrical fish}, under {Electrical}.
Note: The common European torpedo ({T. vulgaris}) and the
      American species ({T. occidentalis}) are the best
      known.
2. An engine or machine for destroying ships by blowing them
   up. Specifically:
   (a) A quantity of explosives anchored in a channel,
       beneath the water, or set adrift in a current, and so
       arranged that they will be exploded when touched by a
       vessel, or when an electric circuit is closed by an
       operator on shore.
   (b) A kind of small submarine boat carrying an explosive
       charge, and projected from a ship against another ship
       at a distance, or made self-propelling, and otherwise
       automatic in its action against a distant ship.
3. (Mil.) A kind of shell or cartridge buried in earth, to be
   exploded by electricity or by stepping on it.
4. (Railroad) A kind of detonating cartridge or shell placed
   on a rail, and exploded when crushed under the locomotive
   wheels, -- used as an alarm signal.
5. An explosive cartridge or shell lowered or dropped into a
   bored oil well, and there exploded, to clear the well of
   obstructions or to open communication with a source of
   supply of oil.
6. A kind of firework in the form of a small ball, or pellet,
   which explodes when thrown upon a hard object.
{Fish torpedo}, a spindle-shaped, or fish-shaped,
   self-propelling submarine torpedo.
{Spar torpedo}, a canister or other vessel containing an
   explosive charge, and attached to the end of a long spar
   which projects from a ship or boat and is thrust against
   an enemy's ship, exploding the torpedo.
{Torpedo boat}, a vessel adapted for carrying, launching,
   operating, or otherwise making use of, torpedoes against
   an enemy's ship.
{Torpedo nettings}, nettings made of chains or bars, which
   can be suspended around a vessel and allowed to sink
   beneath the surface of the water, as a protection against
   torpedoes.
\Tor*pe"do\, v. t.
to destroy by, or subject to the action of, a torpedo.
--London Spectator.