pyrethrin
Word Rarity
Very rare
Frequency: Zipf frequency 1.31 in modern English
17
Scrabble Score
9
Letters
1
Syllables
8
Unique Chars
Meaning
noun
Any of a number of naturally occurring insecticides extracted from the pyrethrum plant; unusual in having a cyclopropane ring.
Example Sentences
- "Ecoparasite control, with appropriate concentrations of carbaryl, malathion, or pyrethrin dusts, is permissible if the agent is applied externally to both test and control animals not less than seven days prior to the start of the test."
- "The biggest risk raised in the findings, Mr. Abecassis said, is the exposure to pesticides, which have been linked to a range of serious illnesses including fatal cancers and organ damage. Six of the tested products contained chemicals like myclobutanil and pyrethrins in concentrations far above state limits, according to the analysis."
- "*Permethrin is the artificial version of pyrethrin, which is made from chrysanthemum flowers."
Etymology
Etymology tree English pyrethrum Proto-Indo-European *-nós Proto-Indo-European *-iHnos Proto-Italic *-īnos Latin -īnusder. Old French -inbor. Middle English -in English -ineclip. English -in English pyrethrin From pyrethrum + -in.