The Collaborative International Dictionary
cow parsnip
Masterwort \Mas"ter*wort`\, n. (Bot.)
A tall and coarse European umbelliferous plant ( Peucedanum Ostruthium, formerly Imperatoria).
The Astrantia major, a European umbelliferous plant with a showy colored involucre.
Improperly, the cow parsnip ( Heracleum lanatum).
Wiktionary
cow parsnip
n. ''Heracleum maximum'', an umbelliferous herb.
WordNet
cow parsnip
n. tall coarse plant having thick stems and cluster of white to purple flowers [syn: hogweed, Heracleum sphondylium]