Noun

1. A plant of the species Helenium, especially Helenium autumnale.
   • 2006, Thomas Pynchon, Against the Day, Vintage 2007, p. 98:

     outracing cyclones and rangefires, switchbacking up the eastern slope of the Rockies through meadows of mule-ear and sneezeweed, on over the great torn crestline, to be delivered at last into these unholy mountains Webb grew to manhood in [...]

2. The plant Centipeda cunninghamii.