pyrethrum - Wikiwand

From Old English pyretre, from (and later reformed after) Latin pyrethrum (in Pliny), from Hellenistic Ancient Greek πύρεθρον (púrethron).

pyrethrum (countable and uncountable, plural pyrethrums)

Any of several daisy-like perennial African plants of the genus Tanacetum, especially Tanacetum cinerariifolium. [from 10th c.]
- 1961, Harry E. Wedeck, Dictionary of Aphrodisiacs, New York: The Citadel Press, page 250:
  A common beverage credited with aphrodisiac virtue was old wine containing the pungent root of the plant pyrethrum or pellitory.
- 1986, Ngũgĩ wa Thiong'o, Decolonising the Mind, Heinemann, published 2005, page 10:
  We children would re-tell the stories the following day to other children who worked in the fields picking the pyrethrum flowers, tea-leaves or coffee beans of our European and African landlords.
Anacyclus pyrethrum (pellitory of Spain)
(organic chemistry) Any of several insecticides obtained from these plants; pyrethrin.

any of several plants of the genus Tanacetum