Dover's powder
noun
Do·ver's powder ˌdō-vərz- 
: a powder of ipecac and opium formerly used as a pain reliever and diaphoretic
Word History
Etymology
Thomas Dover †1742 English physician
First Known Use
1801, in the meaning defined above
Medical Definition
Dover's powder
noun
Do·ver's powder ˈdō-vərz-
: a powder of ipecac and opium that is now compounded in the United States with lactose and in England with potassium sulfate and that is used as an anodyne and diaphoretic