Dictionary
ar•ca•num
Pronunciation: (är-kā'num), [key]—
n.,
—pl. -naPronunciation: (-nu). [key]
1. Often,
arcana. a secret; mystery.
2. a supposed great secret of nature that the alchemists sought to discover.
3. a secret and powerful remedy.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.