permethrinn.

Brit.

/pəːˈmɛθrɪn/, U.S.

/ˌpərˈmɛθrən/

Origin: Formed within English, by derivation. Etymons: per- prefix, resmethrin n.

Etymology: < per- prefix + -methrin (in resmethrin n.).

A synthetic pyrethroid used as an insecticide, parasiticide, and pediculicide; 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylic acid (3-phenoxyphenyl)methyl ester, C₂₁H₂₀Cl₂O₃.

ΘΚΠ

the world > matter > chemistry > organic chemistry > organic compounds > [noun] > other organic compounds

xanthide1823

idrialin1838

barégin1863

violantin1866

biguanide1881

turmerol1890

tetrazole1892

oxazolone1899

indanthrene1901

silicone1906

platinum blue1908

hydroxycitronellal1929

haloform1931

octamethylcyclotetrasiloxane1946

organo-siloxane1946

chlorofluorocarbon1947

permethrin1975

CFC1976

the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > terpenes > pyrethroids > named

permethrin1975

1975 B.S.I. News Feb. 21/1 Permethrin.

1978 Daily Tel. 2 Oct. 3/1 Permethrin, which is used in fly sprays but is not considered harmful to people and pets, is to be added to water supplies in parts of Essex to kill worms.

1986 Courier-Mail (Brisbane) 12 Nov. 1/4 Mr Webster said the permethrin, a chemical already widely used to kill cockroaches, had an immediate effect on household pests.

1991 Holiday Which? Jan. 25/1 Spray walls and mosquito nets with long-lasting insecticides such as permethrin.

2001 Cats June 38/3 Many flea control products are intended for dogs only and contain high concentrations of powerful insecticides like permethrins.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	permethrin
释义	permethrinn. Brit. /pəːˈmɛθrɪn/, U.S. /ˌpərˈmɛθrən/ Origin: Formed within English, by derivation. Etymons: per- prefix, resmethrin n. Etymology: < per- prefix + -methrin (in resmethrin n.). A synthetic pyrethroid used as an insecticide, parasiticide, and pediculicide; 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylic acid (3-phenoxyphenyl)methyl ester, C₂₁H₂₀Cl₂O₃. ΘΚΠ the world > matter > chemistry > organic chemistry > organic compounds > [noun] > other organic compounds xanthide1823 idrialin1838 barégin1863 violantin1866 biguanide1881 turmerol1890 tetrazole1892 oxazolone1899 indanthrene1901 silicone1906 platinum blue1908 hydroxycitronellal1929 haloform1931 octamethylcyclotetrasiloxane1946 organo-siloxane1946 chlorofluorocarbon1947 permethrin1975 CFC1976 the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > terpenes > pyrethroids > named permethrin1975 1975 B.S.I. News Feb. 21/1 Permethrin. 1978 Daily Tel. 2 Oct. 3/1 Permethrin, which is used in fly sprays but is not considered harmful to people and pets, is to be added to water supplies in parts of Essex to kill worms. 1986 Courier-Mail (Brisbane) 12 Nov. 1/4 Mr Webster said the permethrin, a chemical already widely used to kill cockroaches, had an immediate effect on household pests. 1991 Holiday Which? Jan. 25/1 Spray walls and mosquito nets with long-lasting insecticides such as permethrin. 2001 Cats June 38/3 Many flea control products are intended for dogs only and contain high concentrations of powerful insecticides like permethrins. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.1975
随便看	craterwall crates crather crathon cratic cratical craticle crating cratling cratometer cratometric craton cratonal cratonic cratons crauke craunch craunched craunches craunching cravat cravat end cravat goose cravat pin cravat scarf