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[dahy-nahy-truh-fee-nawl, -nol] /daɪˌnaɪ trəˈfi nɔl, -nɒl/
noun, Chemistry, Pharmacology.
any of the six isomers consisting of phenol where two hydrogen atoms are substituted by nitro groups, C 6 H 4 N 2 O 5 , used in dyes and wood preservatives, and in biochemistry to uncouple oxidative phosphorylation.
Origin of dinitrophenol
First recorded in 1895-1900; di-1 + nitrophenol Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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dinitrophenol in Medicine

dinitrophenol di·ni·tro·phe·nol (dī-nī'trō-fē'nôl', -nōl')
Any of six crystalline compounds, especially a highly toxic compound that increases fat metabolism and was formerly used in weight control.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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