lactucarium

noun
lac·​tu·​ca·​ri·​um | \ ˌlak-tə-ˈkar-ē-əm, -ˈker- How to pronounce lactucarium (audio) \

Medical Definition of lactucarium

: the dried milky juice of a wild lettuce (Lactuca virosa) of central and southern Europe that resembles opium in physical properties and was formerly used as a sedative

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