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Meaning of ninhydrin

nin•hy•drin

Pronunciation: (nin-hī'drin), [key]
— n. Chem.
  1. a white or yellow, toxic, crystalline or powdery compound, CHO&multiplydot;HO, 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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.