Definition of Pyrethrin

1. n. A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew; -- called also Pyrethrum camphor.



Definition of Pyrethrin

1. Noun. (chemistry) Any of a number of naturally occurring insecticides extracted from the pyrethrum plant; unusual in having a cyclopropane ring. ¹

¹ Source: wiktionary.com

Definition of Pyrethrin

1. [n -S]

Pyrethrin Pictures

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Lexicographical Neighbors of Pyrethrin

pyrazolopyrimidines
pyrazolyl
pyrazoxyfen
pyrazyl
pyre
pyrectic
pyrectics
pyree
pyrena
pyrene
pyrenes
pyrenic
pyrenoid
pyrenoids
pyres
pyrethrin (current term)
pyrethrine
pyrethrins
pyrethroid
pyrethroids
pyrethrum
pyrethrums
pyretic
pyretology
pyretotherapy
pyrexes
pyrexia
pyrexial
pyrexias
pyrexic

Literary usage of Pyrethrin

Below you will find example usage of this term as found in modern and/or classical literature:

1. Proceedings of the American Pharmaceutical Association at the Annual Meeting by American Pharmaceutical Association, National Pharmaceutical Convention (1897)
"He has now succeeded in preparing pure pyrethrin as follows : The ... pyrethrin, viewed under the lens, appears as long, branched needles, united to form ..."

2. Proceedings of the American Pharmaceutical Association at the Annual Meeting by American Pharmaceutical Association, National Pharmaceutical Convention, American Pharmaceutical Association Meeting (1897)
"He has now succeeded in preparing pure pyrethrin as follows : The ... pyrethrin, viewed under the lens, appears as long, branched needles, united to form ..."

3. Recognition & Management of Pesticide Poisoning by Donald P. Morgan (1989)
"There are presently no practical tests for pyrethrin metabolites or pyrethrin ... TREATMENT OF PYRETHRUM OR pyrethrin TOXICOSIS Antihistamines are effective ..."

4. American Druggist (1890)
"The active principle is shown not to be identical with pyrethrin by the fact that the root of pyrethrum (which also contains pyrethrin) has no action upon ..."

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