Philosopher's Stone

Philosopher's Stone was, with the Elixir of Life, the object of the search of the mediæval alchemists. Their theory regarded gold as the most perfect metal, all others being removed from it by various stages of imperfection, and they sought an amalgam of pure sulphur and pure mercury, which, being more perfect still than gold, would transmute the baser metals into the nobler.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Philosophe * Philosophism, French
Philips, Katherine
Philistine
Philistines
Phillip, John
Phillips, Wendell
Philo Judæus
Philocretes
Philomela
Philopœmon
Philosophe
Philosopher's Stone
Philosophism, French
Philosophy
Philoxenus
Philpotts, Henry
Philtre
Phiz
Phlegethon
Phlogiston
Phocas
Phocion