pyrethrum

py·reth·rum

US/paɪˈɹiθɹəm/ uncommon

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

Synonyms

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

used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum

Synonyms

genus Pyrethrum

Origin

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

Related words

Broader terms

Parts

WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.

noun
singular	pyrethrum
plural	pyrethrums