China white

noun, often capitalized W
Chi·​na white | \ ˈchī-nə-ˈ(h)wīt How to pronounce China white (audio) \

Medical Definition of China white

slang
1 : a pure potent form of heroin originating in southeastern Asia
2 : an illicit analog of the analgesic fentanyl that resembles heroin in its physical appearance and physiological effects