How do you spell Alchemy

Available Definitions:
1)  n. - An imaginary art which aimed to transmute the baser metals into gold, to find the panacea, or universal remedy for diseases, etc. It led the way to modern chemistry.
2)  n. - A mixed metal composed mainly of brass, formerly used for various utensils; hence, a trumpet.
3)  n. - Miraculous power of transmuting something common into something precious.