philosophers' stone
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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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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]
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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" |
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