- Any of some nitro types of aniline.
- anybody of a series of nitro derivatives of aniline; nitroaniline. In general they're yellowish crystalline substances.
- Any one of three substances, H2NC6H4NO2. They have been distinguished as ortho- or 1, 2, or meta- or 1, 3, and para- or 1, 4. They truly are formed because of the activity of nitric acid on acetanilide, tend to be crystalline, and melt at 71° C. 114° C. and 147° C. respectively. Also known as nitro-anilines.