phenolphthalein(redirected from Phenol phthalein)
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Related to Phenol phthalein: methyl orange
a cathartic and pH indicator.
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 hydrogen ion indicator obtained by the action of phenol on phthalic anhydride; formerly used as a laxative.
Farlex Partner Medical Dictionary © Farlex 2012
phenolphthalein(fē′nōl-thăl′ēn′, -thăl′ē-ĭn, -thā′lēn′, -thā′lē-ĭn)
A white or pale yellow crystalline powder, C20H14O4, used as an acid-base indicator, in making dyes, and formerly in medicine as an over-the-counter laxative.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.