torpedo tube

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A tube in the hull of a submarine or another naval vessel or mounted on the deck of a surface warship, through which torpedoes are launched.

from The Century Dictionary.

• noun Sameas launching-tube.

from the GNU version of the Collaborative International Dictionary of English.

• (Nav.) A tube fixed below or near the water line through which a torpedo is fired, usually by a small charge of gunpowder. On torpedo vessels the tubes are on deck and usually in broadside, on larger vessels usually submerged in broadside and fitted with a movable shield which is pushed out from the vessel's side to protect the torpedo until clear, but formerly sometimes in the bow. In submarine torpedo boats they are in the bow.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun nautical The tube, through the hull of a submarine, though which torpedoes are launched

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a tube near the waterline of a vessel through which a torpedo is fired