genus pyrethrum is a noun meaning "used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum". It carries one recorded sense.
used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum
Definitions, synonyms and semantic relations for genus pyrethrum come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.