A solution to all problems.
A remedy believed to cure all disease and prolong life that was originally sought by alchemists; a cure-all.
Any straightforward solution perceived to have great effectiveness or bring miraculous results.
A thermometer, especially one used for rectal temperature readings.
A cocktail somewhat like a martini.
A bullet made of silver, usually with reference to the folkloric belief that such bullets are the only weapons which can kill a werewolf, vampire, or other monster.