/ Dictionary / Index P pleochroic: Meaning and Definition of Find definitions for: ple•o•chro•ic Pronunciation: (plē"u-krō'ik), [key] — adj. (of a biaxial crystal) characterized by pleochroism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pleochroic (Thesaurus) pleo- pleochroism Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language