The Collaborative International Dictionary
Citrus decumana
Forbidden \For*bid"den\, a. Prohibited; interdicted. I know no spells, use no forbidden arts. --Milton. Forbidden fruit.
Any coveted unlawful pleasure, -- so called with reference to the forbidden fruit of the Garden of Eden.
(Bot.) A small variety of shaddock ( Citrus decumana). The name is given in different places to several varieties of Citrus fruits.
Citrus decumana
Shaddock \Shad"dock\, n. [Said to be so called from a Captain Shaddock, who first brought this fruit from the East Indies.] (Bot.) A tree ( Citrus decumana) and its fruit, which is a large species of orange; -- called also forbidden fruit, and pompelmous.