[roh-zan-l-in, -ahyn]
noun Chemistry.
a red dye, C 2 0 H 2 0 N 3 Cl, derived from aniline and orthotoluidine, a constituent of fuchsin.
the base, C 2 0 H 2 1 N 3 O, which, with hydrochloric acid, forms this dye.

1860–65; rose1 + aniline Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
rosaniline or rosanilin (rəʊˈzænɪˌliːn, -lɪn)
See also fuchsin a reddish-brown crystalline insoluble derivative of aniline used, in the form of its soluble hydrochloride, as a red dye
[C19: from rose1 + aniline]
rosanilin or rosanilin
[C19: from rose1 + aniline]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

rosaniline ros·an·i·line or ros·an·i·lin (rō-zān'ə-lĭn)
A brownish-red crystalline organic compound derived from aniline and used in the manufacture of dyes and in Schiff's reagent.

The American Heritage® Stedman's Medical Dictionary
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