Definitions for pyrethrum
paɪˈri θrəm, -ˈrɛθ rəmpyrethrum

Princeton's WordNetRate this definition:0.0 / 0 votes

1. pyrethrumnoun

   made of dried flower heads of pyrethrum plants

2. pyrethrum, Dalmatian pyrethrum, Dalmatia pyrethrum, Tanacetum cinerariifolium, Chrysanthemum cinerariifoliumnoun

   white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum

3. painted daisy, pyrethrum, Tanacetum coccineum, Chrysanthemum coccineumnoun

   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

4. Pyrethrum, genus Pyrethrumnoun

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

WiktionaryRate this definition:0.0 / 0 votes

1. pyrethrumnoun

   Any of several perennial African plants of the genus Chrysanthemum, especially Chrysanthemum cinerariaefolium

2. pyrethrumnoun

   Any of several insecticides obtained from these plants; pyrethrin

ChatGPTRate this definition:0.0 / 0 votes

1. pyrethrum

   Pyrethrum is a type of natural insecticide derived from the dried flower heads of plants, primarily Chrysanthemum cinerariifolium and Chrysanthemum coccineum. It contains compounds known as pyrethrins, which are toxic to insects but have low toxicity towards mammals and birds. Pyrethrum is widely used in organic farming and home pest control because of its relatively low environmental impact.

WikidataRate this definition:0.0 / 0 votes

1. Pyrethrum

   Pyrethrum refers to several Old World plants of the genus Chrysanthemum which are cultivated as ornamentals for their showy flower heads. Pyrethrum is also the name of a natural insecticide made from the dried flower heads of Chrysanthemum cinerariifolium and Chrysanthemum coccineum.

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Pyrethrum

   pir-eth′rum, n. a genus of plants containing the fever-few, or golden-feather, so much used in gardens as a bordering. [L.,—Gr.,—pyr, fire.]

Matched Categories

1. • Asterid Dicot Genus
   • Flower
   • Herb
   • Insecticide

Usage in printed sourcesFrom: 

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How to pronounce pyrethrum?

1. Alex

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   British

   Libby

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   Mia

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   Australian

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How to say pyrethrum in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of pyrethrum in Chaldean Numerology is: 1

2. Pythagorean Numerology

   The numerical value of pyrethrum in Pythagorean Numerology is: 9

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=pyrethrum
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Pyrethrum
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=pyrethrum
5. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=pyrethrum
6. ^ Usage in printed sources
   https://books.google.com/ngrams/graph?content=pyrethrum