acetonylacetone
noun
ac·e·ton·yl·ac·e·tone
ˈa-sə-(ˌ)tō-ˌnil-ˈa-sə-ˌtōn,
ə-ˈse-tə-
plural -s
: a mobile fragrant liquid diketone (CH3COCH2)2 obtained by hydrolysis of 2,5-dimethyl-furan and in other ways; 2,5-hexane-dione
Word History
Etymology
International Scientific Vocabulary acetonyl + acetone
First Known Use
1884, in the meaning defined above