SINCE 1828
lactucarium
noun
lac·tu·ca·ri·um
| \ ˌlak-tə-ˈkar-ē-əm, -ˈker-
\
\
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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