chemical base used in making colorful dyes, 1843, coined 1841 by German chemist Carl Julius Fritzsche (1808-1871) and adopted by Hofmann, ultimately from Portuguese anil "the indigo shrub," from Arabic an-nil "the indigo," assimilated from al-nil, from Persian nila, ultimately from Sanskrit nili "indigo," from nilah "dark blue." With suffix -ine indicating "derived substance" (see -ine(1); also see -ine(2) for the later, more precise, use of the suffix in chemistry).