: a nitro derivative of aniline: such as
a
: the bright yellow crystalline para mono derivative H2NC6H4NO2 made usually from para -nitro-chlorobenzene by reaction with ammonia or from acetanilide by nitration and hydrolysis and used chiefly as an intermediate for azo and azoic dyes
b
: the orange-yellow crystalline ortho isomer made similarly to the para derivative
c
: the yellow crystalline meta isomer made usually from meta -dinitrobenzene by partial reduction and used chiefly as a dye intermediate
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Merriam-Webster unabridged
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