Definitions for "Masterwort"
A tall and coarse European umbelliferous plant (Peucedanum Ostruthium, formerly Imperatoria).
The Astrantia major, a European umbelliferous plant with a showy colored involucre.
Peucedanum ostruthium, a perennial herb with divided leaves and an aromatic root. It is also called Imperatoria.
Improperly, the cow parsnip (Heracleum lanatum).