Definition of "rosaniline" []

• A brownish-red crystalline organic compound, C20H21N3O, derived from aniline and used in the manufacture of dyes and in Schiff's reagent. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "In a series of masterly experiments von Baeyer demonstrated several years ago the chemical nature of the phthaleins and showed that, just like the already known rosaniline dyes, they may be classified as derivatives of the hydrocarbon triphenylmethane."
• "Members of the rosaniline group are all similarly fugitive, while those of the alizarin group possess generally the quality of fastness."
• "Neelson found that the pigment of _B. cyanogenus_ gives a band in the yellow and strong lines at E and F in the solar spectrum -- an absorption spectrum almost identical with that of triphenyl-rosaniline."