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(Dyeing) any of a class of blue dyes obtained from aniline and aminoazobenzene
[C19: from indigo + -ule + -ine2]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
in•du•line(ˈɪn dyəˌlin, -lɪn, ˈɪn dlˌin)
any of a large class of dyes yielding colors similar to indigo.
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