GNU Collaborative International Dictionary of English

Found 2 definitions

1.       
   Cow parsnip . (Bot.) A coarse umbelliferous weed of the genus Heracleum (Heracleum sphondylium in England, and Heracleum lanatum in America).
   1913 Webster
         
       

2.       
   Masterwort , 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).
   1913 Webster