HIP'POMANE, noun [Gr. a horse, and madness.] 1. A sort of poisonous substance, used anciently as a philter or love-charm. 2. In botany, the manchineel-tree, which abounds with a milky juice which is acrid, caustic and poisonous.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI