n.1 Alchemy a a preparation supposedly able to change metals into gold. b (in full elixir of life) a preparation supposedly able to prolong life indefinitely. c a supposed remedy for all ills.
2 Pharm. an aromatic solution used as a medicine or flavouring.
Etymology: ME f. med.L f. Arab. al-iksir f. al the + iksir prob. f. Gk xerion powder for drying wounds f. xeros dry