philosophers' stone

phi·los·o·phers' stone

also phi·los·o·pher's stone (fĭ-lŏs′ə-fərz)n. A substance that was believed to have the power of transmuting base metal into gold. Also called elixir.

philos′ophers'

(or philos′opher's) stone`,

n. a substance sought by alchemists that would be capable of transmuting baser metals into gold or silver and of prolonging life. [1350–1400]

Thesaurus

Noun

philosophers' stone - hypothetical substance that the alchemists believed to be capable of changing base metals into goldphilosopher's stone, elixirsubstance - a particular kind or species of matter with uniform properties; "shigella is one of the most toxic substances known to man"

philosophers' stone