tanacetum ptarmiciflorum is a noun meaning "shrubby perennial of the Canary Islands having white flowers and leaves and hairy stems covered with dustlike down; sometimes placed in genus Chrysanthemum". It carries one recorded sense.
Definitions, synonyms and semantic relations for tanacetum ptarmiciflorum come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.