Merriam-Webster Collegiate Dictionary - dover's powder

 noun  Etymology: Thomas Dover died 1742 English physician  Date: 1801 a powder of ipecac and opium formerly used as a pain reliever and diaphoretic DOVETAIL  I. noun  Date: 1573 something resembling a dove's tail; especially a flaring tenon and a mortise into which it fits tightly making an interlocking joint between two pieces (as of wood)  II. verb  Date: circa 1656  transitive verb  1.  a. to join by means of ~s  b. to cut to a ~  2.  a. to fit skillfully to form a whole  b. to fit together with  intransitive verb to fit together into a whole