phthalein Hear it!

phthalein definition

phthal·ein (t̸hal′ēn′, -ē in; ft̸hal′-)

noun

any of a group of synthetic dyes manufactured from phenols and phthalic anhydride

Etymology: < phthalic acid + -in

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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