a composite plant, Achillea ptarmica, of Europe, the powdered leaves of which cause sneezing.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
British Dictionary definitions for sneezewort
a Eurasian plant, Achillea ptarmica, having daisy-like flowers and long grey-green leaves, which cause sneezing when powdered: family Asteraceae (composites): See also yarrow
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012