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methylacetic acid

American  
[meth-uhl-uh-see-tik, -uh-set-ik] / ˈmɛθ əl əˈsi tɪk, -əˈsɛt ɪk /

noun

Chemistry.
  1. propionic acid.


Etymology

Origin of methylacetic acid

First recorded in 1880–85; methyl- + acetic acid