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We found 30 dictionaries with English definitions that include the word pyrethrum:
Click on the first link on a line below to go directly to a page where "pyrethrum" is defined.

General (23 matching dictionaries)

1. pyrethrum: Merriam-Webster.com [home, info]
2. Pyrethrum, pyrethrum: Oxford Dictionaries [home, info]
3. pyrethrum: American Heritage Dictionary of the English Language [home, info]
4. pyrethrum: Collins English Dictionary [home, info]
5. Pyrethrum, pyrethrum: Vocabulary.com [home, info]
6. Pyrethrum, pyrethrum: Wordnik [home, info]
7. pyrethrum: Wiktionary [home, info]
8. pyrethrum: Webster's New World College Dictionary, 4th Ed. [home, info]
9. pyrethrum: The Wordsmyth English Dictionary-Thesaurus [home, info]
10. pyrethrum: Infoplease Dictionary [home, info]
11. pyrethrum: Dictionary.com [home, info]
12. Pyrethrum, pyrethrum: UltraLingua English Dictionary [home, info]
13. Pyrethrum: Wikipedia, the Free Encyclopedia [home, info]
14. Pyrethrum: Rhymezone [home, info]
15. pyrethrum: Hutchinson's Dictionary of Difficult Words [home, info]
16. Pyrethrum: 1911 edition of the Encyclopedia Britannica [home, info]
17. pyrethrum: Free Dictionary [home, info]
18. pyrethrum: Hutchinson Dictionaries [home, info]
19. pyrethrum: Luciferous Logolepsy [home, info]
20. pyrethrum: Mnemonic Dictionary [home, info]
21. pyrethrum: WordNet 1.7 Vocabulary Helper [home, info]
22. Pyrethrum, pyrethrum: LookWAYup Translating Dictionary/Thesaurus [home, info]
23. pyrethrum: Dictionary/thesaurus [home, info]

Computing (1 matching dictionary)

24. pyrethrum: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

25. pyrethrum: online medical dictionary [home, info]
26. pyrethrum: Medical dictionary [home, info]

Science (3 matching dictionaries)

27. pyrethrum: Dictionary of Botanical Epithets [home, info]
28. Pyrethrum: Botanical Name listing of Plants [home, info]
29. Pyrethrum: Garden Flower, Shrub and Tree Glossary [home, info]

Tech (1 matching dictionary)

30. pyrethrum: Book Binding [home, info]

(Note: See pyrethrums for more definitions.)

Quick definitions from WordNet (Pyrethrum) ▸ noun:  used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum ▸ noun:  white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum ▸ noun:  made of dried flower heads of pyrethrum plants ▸ noun:  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 ▸ Also see pyrethrums ▸ Words similar to pyrethrum ▸ Usage examples for pyrethrum ▸ Popular adjectives describing pyrethrum ▸ Words that often appear near pyrethrum ▸ Rhymes of pyrethrum ▸ Invented words related to pyrethrum