/ Dictionary / Index A allochromatic: Meaning and Definition of Find definitions for: al•lo•chro•mat•ic Pronunciation: (al"u-kru-mat'ik, -krō-), [key] — adj. pertaining to or having photochemical properties resulting from an impurity or from exposure to radiation. (of a mineral) having no color in itself but bearing colored impurities. Cf. idiochromatic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. allocher allochthon Related Content Daily Word Quiz: confectionery Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language