Philosopher /(?)/

Phi·los·o·pher

Philosopher

n.
  1. One who philosophizes; one versed in, or devoted to, philosophy.
    Then certain philosophers of the Epicureans, and of the Stoics, encountered him.
    — Acts xvii. 18.
  2. One who reduces the principles of philosophy to practice in the conduct of life; one who lives according to the rules of practical wisdom; one who meets or regards all vicissitudes with calmness.
  3. An alchemist. [Obs.]

Phrases & Compounds
Philosopher's stone
an imaginary stone which the alchemists formerly sought as the instrument of converting the baser metals into gold.