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a crystalline hydrocarbon, C14h10, from coal tar, used in making dyes.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


A dye, dye intermediate, and antiseptic precursor (for example, 9-aminoacridine, acriflavine, proflavine hemisulfate) derived from coal tar and irritating to skin and mucous membranes; a potent mutagen.
Synonym(s): dibenzopyridine
Farlex Partner Medical Dictionary © Farlex 2012


A dye molecule capable of causing a FRAME-SHIFT MUTATION in DNA by interposing between adjacent base pairs. Acridine orange stains nucleic acid so that under ultraviolet light DNA appears green and RNA appears orange.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005