: a colorless liquid diketone of pleasant odor known in two forms [keto form CH3COCH2COCH3 and enol form CH3COCHC(OH)CH3] made in various ways (as by the reaction of sodium with acetone and ethyl acetate); 2,4-pentanedione
First Known Use of acetylacetone
1887, in the meaning defined above
History and Etymology for acetylacetone
International Scientific Vocabulary acetyl + acetone