Definition of rabbit weed in US English:

rabbit weed

noun

rare
  • 1Any of several North American weeds of the family Asteraceae (Compositae), especially Hymenoxys richardsonii var. floribunda and Gutierrezia sarothrae, both of which are woody plants with clusters of small yellow ray flowers.

  • 2The tropical plant Priva lappulacea (family Verbenaceae).

Origin

Mid 18th century; earliest use found in Griffith Hughes (1707–1750).