'Hawkweed' definitions:

Definition of 'hawkweed'

From: WordNet
noun
Any of various plants of the genus Pilosella
noun
Any of numerous often hairy plants of the genus Hieracium having yellow or orange flowers that resemble the dandelion

Definition of 'Hawkweed'

From: GCIDE
  • Hawkweed \Hawk"weed`\ (-w[=e]d`), n. (Bot.) (a) A plant of the genus Hieracium; -- so called from the ancient belief that birds of prey used its juice to strengthen their vision. (b) A plant of the genus Senecio (Senecio hieracifolius). --Loudon. [1913 Webster]