ˌhīəˈrāshēəm noun
Etymology: New Latin, from Greek hierakion hawkweed, from hierak-, hierax hawk, from hienai to hurry — more at via
1. capitalized : a very large and nearly cosmopolitan genus of weedy perennial herbs (family Compositae) having simple often basal leaves and heads of yellow or reddish orange ray flowers — see orange hawkweed
2. pl hieracia also hieraciums : any plant of the genus Hieracium