The Collaborative International Dictionary of English v.0.48:
Emmenagogue \Em*men"a*gogue\, n. [Gr. ?, n. pl., menses (? in + ? month) + ? leading, fr. ? to lead: cf. F. emm['e]nagogue.] (Med.) A medicine that promotes the menstrual discharge. [1913 Webster] Emmenthal Emmentaler EmmentalWordNet (r) 3.0 (2006):
emmenagogue n 1: any agent that promotes menstrual discharge