Mas"ter*wort` (?), n. Bot. (a)
A tall and coarse European umbelliferous plant (Peucedanum Ostruthium, formerly Imperatoria).
(b)
The Astrantia major, a European umbelliferous plant with a showy colored involucre.
(c)
Improperly, the cow parsnip (Heracleum lanatum).
© Webster 1913.