/ Dictionary / Index A alizarin crimson: Meaning and Definition of Find definitions for: aliz'arin crim'son Pronunciation: [key] a pigment used in painting, derived from anthraquinone and characterized by its red color and transparency. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. alizarin alk. Related Content Daily Word Quiz: supercilious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language