any of various chemical compounds having similar insecticidal properties to pyrethrin
adjective
2.
of or relating to such compounds
pyrethroid in American English
(paiˈriθrɔid, -ˈreθrɔid)
noun
Chemistry
any of several synthetic compounds that are similar to but more persistent than natural pyrethrins
Word origin
[1950–55; pyrethr(in) + -oid]This word is first recorded in the period 1950–55. Other words that entered Englishat around the same time include: Common Market, action painting, bleep, conflict of interest, wiretap-oid is a suffix meaning “resembling,” “like,” used in the formation of adjectives andnouns (and often implying an incomplete or imperfect resemblance to what is indicatedby the preceding element). Other words that use the affix -oid include: alkaloid, anthropoid, cardioid, cuboid, lithoid
Examples of 'pyrethroid' in a sentence
pyrethroid
For mild cases, spray a pyrethroid insecticide such as cypermethrin.
Times, Sunday Times (2016)
Farmers like neonicotinoids because seeds come treated with the pesticide, removing the need to spray crops with pyrethroid insecticides.
Times, Sunday Times (2017)
Some websites suggest dusting with pyrethroid insecticides, but this is a draconian and disproportionate response.
Times, Sunday Times (2016)
Alternative methods, such as repeatedly spraying crops with pyrethroid insecticides, may be moreharmful to pollinators.
Times, Sunday Times (2017)
This means that more than 80 per cent of the lice tested were resistant to pyrethroid insecticides.
Times, Sunday Times (2006)
Aphids, for example, are the main problem in cereal crops and are increasingly resistant to pyrethroid sprays.