from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A synthetic red crystalline nitrogenous substance which by reduction passes directly to indigo.
from the GNU version of the Collaborative International Dictionary of English
- n. A red crystalline nitrogenous substance of artificial production, which by reduction passes directly to indigo.
from The Century Dictionary and Cyclopedia
- n. A red compound, C16H8O4N2, prepared by the action of sulphuric acid on dinitro-diphenyl-diacetylene. It crystallizes in needles, and is readily converted into indigo by reducing agents.
di- + isatogen (Wiktionary)