| sneezeweed | (n) any of various plants of the genus Helenium characteristically causing sneezing |
| sneezeweed yarrow | (n) Eurasian herb having loose heads of button-shaped white flowers and long grey-green leaves that cause sneezing when powdered, Syn. sneezewort, Achillea ptarmica |
| Sneezeweed | n. (Bot.) A yellow-flowered composite plant (Helenium autumnale) the odor of which is said to cause sneezing. [ 1913 Webster ] |