/ Dictionary / Index R rosaniline: Meaning and Definition of Find definitions for: ros•an•i•line Pronunciation: (rō-zan'l-in, -īn"), [key] — n. Chem. a red dye, CHNCl, derived from aniline and orthotoluidine, a constituent of fuchsin. the base, CHNO, which, with hydrochloric acid, forms this dye. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Rosamund Rosanne Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language