noun
also hydragog ˈhīdrəˌgäg
( -s )
Etymology: obsolete hydragogue, adjective, causing a watery discharge from the bowels, from Late Latin hydragogus, from Greek hydragōgos, from hydr- + agōgos leading, drawing forth — more at -agogue
: a cathartic that causes copious watery discharges from the bowels