Meaning of idiochromatic

id•i•o•chro•mat•ic

Pronunciation: (id"ē-u-krō-mat'ik, -ō-kru-), [key]
— adj.
  1. (of a mineral) deriving a characteristic color from its capacity to absorb certain light rays. Cf. allochromatic.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.