spec. = philosophers' stone, n.

A mythical solid substance, supposed to change any metal into gold or silver and (according to some) to cure all wounds and diseases and prolong…

Designating one of the several varieties of the philosophers' stone; cf. vegetable stone n. at vegetable, adj. compounds 2. Obsolete.

spec. in Alchemy (cf. fermentation, n. 1b); sometimes applied to the ‘philosopher's stone’. Also in cosmological speculations (see quot. 1677).

= philosophers' stone, n. 1. Cf. philosophers' egg n. at compounds 3, philosophical egg n. at philosophical, adj. n.compounds.

a variety of the philosophers' stone.

That gives life; animating, invigorating. Obsolete. rare.

= philosophers' stone, n. 1.

A rough figured stone, used esp. in divination; = erotylos, n. Also as a modifier in amphicome stone.

A rough, figured stone, used esp. in divination; = amphicome, n.

A supposed drug or essence with the property of indefinitely prolonging life; imagined by the alchemists to be either identical with, or closely…

= philosophers' stone, n. 1.

= philosophers' stone, n. 1.

a preparation supposedly able to prolong youthfulness or to reverse the ageing process; (also figurative) something that gives a person vitality…