noun
- Made of dried flower heads of pyrethrum plants.
- White-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum.
- Spring-flowering garden perennial of Asiatic origin having finely divided aromatic leaves and white to pink-purple flowers; source of an insecticide; sometimes placed in genus Chrysanthemum.
- synonyms: painted daisy, Tanacetum coccineum, Chrysanthemum coccineum
- Used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum.
- synonyms: genus Pyrethrum
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). pyrethrum. Retrieved September 21, 2026, from http://smartdefine.org/pyrethrum/definitions/1237601 |
| Chicago | WordNet. 2010. "pyrethrum" http://smartdefine.org/pyrethrum/definitions/1237601 (accessed September 21, 2026). |
| Harvard | WordNet 2010, pyrethrum, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/pyrethrum/definitions/1237601>. |
| MLA | WordNet. "pyrethrum" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/pyrethrum/definitions/1237601> |