Definition of acetylic in English:

acetylic

Pronunciation /asɪˈtɪlɪk/

adjective

rare Chemistry
  • Containing one or more acetyl groups (—C(O)CH₃); derived from acetic acid. Compare "acetic", "acetyl".

Origin

Mid 19th century; earliest use found in George Fownes (1815–1849), chemist. From acetyl + -ic.