- cyanogen
[cyanogen 词源字典]
- "A colourless flammable highly poisonous gas made by oxidizing hydrogen cyanide", Early 19th century: from French cyanogène, from Greek kuanos 'dark blue mineral' + -gène (see -gen), so named because it is a constituent of Prussian blue.[cyanogen etymology, cyanogen origin, 英语词源]