emeto-cathartic,n.anda.Med.|ˌɛmɪtəʊkəˈθɑːtɪk| [f.Gr. ἔµετο-ς vomiting + καθαρτικός purgative.] A.adj. Having power to cause both purging and vomiting. B.n. A substance having this power. 1879Syd. Soc.Lex.s.v.Ailanthus, These preparations act as emetocathartics, as well as tæniafuges.