acetylcysteine

noun

ace·tyl·cys·te·ine | \ ə-ˌsēt-ᵊl-ˈsis-tə-ˌēn

, ˌas-ə-ˌtēl-

, ˌas-ət-ᵊl-\

Medical Definition of acetylcysteine

: a mucolytic agent C₅H₉NO₃S used especially to reduce the viscosity of abnormally viscid respiratory tract secretions — see mucomyst