a large white-flowered weed of the parsley family, native to north temperate regions and formerly used as forage for pigs.
Genus Heracleum, family Umbelliferae: several species, in particular the common European H. sphondylium and the introduced giant hogweed (H. mantegazzianum)
hogweed in other Oxford dictionaries
Definition of hogweed in the US English dictionary
