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phthalin

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phthal⋅in

[thal-in, fthal-]
–noun Chemistry.
any of a group of compounds obtained by the reduction of the phthaleins.

Origin:
1870–75; (na)phthal(ene) + -in 2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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phthal·in   (thāl'ĭn, fthāl'-)   
n.  Any of various colorless compounds derived from the reduction of phthaleins.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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