Definitions
from The Century Dictionary.
- noun A blue flocculent precipitate obtained when propiolic acid in sulphuric-acid solution is treated with reducing agents such as metallic iron, zinc, or copper. It differs from indigo in not easily yielding a sulphonic acid on heating.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Chem.) A substance resembling indigo blue, obtained artificially from certain isatogen compounds.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun organic chemistry A substance resembling
indigo blue , obtained artificially from certainisatogen compounds .
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
-in
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