- An alkaloid found in small quantities in opium, and
extracted as a white crystalline substance of a bitter astringent
taste. It is a narcotic. Called also narceia.
- Pertaining to, or designating, a complex nitrogenous
acid, obtained by the action of acetic acid and potassium nitrite on
uric acid, as a yellow crystalline substance, with a bitter, astringent
taste.
- Pertaining to, or designating, a yellow crystalline
astringent acid, (NO2)3.C6H.(OH)2, obtained by the action of nitric
acid on resorcin. Styphnic acid resembles picric acid, but is not
bitter. It acts like a strong dibasic acid, having a series of well
defined salts.