Merriam-Webster Collegiate Dictionary - ipecac

 also ~uanha  noun  Etymology: Portuguese ~uanha, from Tupi ?pekakwan?a, from ?peka duck + akwan?a penis  Date: 1682  1. the dried rhizome and roots of either of two tropical American plants (Cephaelis acuminata and C. ~uanha) of the madder family used especially as a source of emetine; also either of these plants  2. an emetic and expectorant drug that contains emetine and is prepared from ~ especially as a syrup for use in treating accidental poisoning