*elaterium*

n. [ L., fr. Gr. &unr_;, neut. of &unr_; driving. See 2d Elater. ] A cathartic substance obtained, in the form of yellowish or greenish cakes, as the dried residue of the juice of the wild or squirting cucumber (Ecballium agreste, formerly called Momordica Elaterium). [ 1913 Webster ]