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phi·los·o·phers' stonealso phi·los·o·pher's stone (fĭ-lŏs′ə-fərz)
A substance that was believed to have the power of transmuting base metal into gold. Also called elixir.
(or philos′opher's) stone`,
a substance sought by alchemists that would be capable of transmuting baser metals into gold or silver and of prolonging life.
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|Noun||1.||philosophers' stone - hypothetical substance that the alchemists believed to be capable of changing base metals into gold|
substance - a particular kind or species of matter with uniform properties; "shigella is one of the most toxic substances known to man"