Elaterium \El`a*te"ri*um\, n. [L., fr. Gr. ?, neut. of ? 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).

Source: Webster's Revised Unabridged Dictionary (1913)