man·chi·neel 
(măn′chĭ-nēl)
(măn′chĭ-nēl)n.
A tropical American tree (Hippomane mancinella) having poisonous fruit and a milky sap that causes skin blisters on contact.
[French mancenille, from Spanish manzanillo, a kind of olive tree bearing fine small olives, manchineel, from manzanilla, fine small olive, fruit of the manchineel, from diminutive of manzana, apple, from Old Spanish mançana; see MANZANILLA.]