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[nin-hahy-drin] /nɪnˈhaɪ drɪn/
noun, Chemistry.
a white or yellow, toxic, crystalline or powdery compound, C 9 H 4 O 3 ⋅H 2 O, that reddens when heated above 100°C, a monohydrate, soluble in water or alcohol: used primarily as a reagent to detect the presence of various amino acids.
Origin of ninhydrin
From German, registered as a trademark for the drug in 1912 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for ninhydrin


a chemical reagent used for the detection and analysis of primary amines, esp amino acids, with which it forms a derivative with an intense purple colour
Word Origin
C20: from the chemical name triketo hydrindene
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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ninhydrin in Medicine

ninhydrin nin·hy·drin (nĭn-hī'drĭn)
A poisonous crystalline oxidizing agent used as an analytic reagent.

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