magnum

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

• adjective Of or relating to a cartridge containing a larger explosive charge than other cartridges of the same size.
• adjective Designed to shoot magnum cartridges.
• noun A magnum cartridge or firearm.
• noun A bottle, holding about two fifths of a gallon (1.5 liters), for wine or liquor.
• noun The amount of liquid that this bottle can hold.

from The Century Dictionary.

• noun A large wine-bottle, usually twice the size of the ordinary bottle used for the same kind of wine.
• noun The quantity of wine contained in such a bottle: as, a magnum of port.
• noun Pl. magna (-nä). In anatomy, the largest bone of the human carpus, in the distal row, between the trapezoid and the unciform, in special relation with the head of the middle metacarpal bone: more fully called os magnum.

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

• noun A large wine bottle.
• noun (Anat.) A bone of the carpus at the base of the third metacarpal bone.
• noun A magnum pistol, or the cartridge such a pistol uses.
• adjective (Firearms) Having a larger charge than usual for a cartridge of the same caliber; -- of cartridges for handgun.
• adjective (Firearms) Designed to use a cartridge with a larger charge than usual for handguns of the same caliber; -- of handguns.

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

• noun wine A bottle of wine containing 1.5 liters of fluid, double the volume of a standard bottle.
• noun A gun calibre larger than, or derived from, a smaller similar cartridge.

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

• noun a large wine bottle for liquor or wine