eupatorium Meaning, Definition & Usage

  1. noun large genus of chiefly tropical herbs having heads of white or purplish flowers
    genus Eupatorium.

WordNet

Eu`pa*to"ri*um noun
Etymology
NL., fr. Eupator, king of Pontus, said to have used it as a medicine.
Definitions
  1. (Bot.) A genus of perennial, composite herbs including hemp agrimony, boneset, throughwort, etc.

Webster 1913