[ pahy-ree-throid, -reth-roid ]
/ paɪˈri θrɔɪd, -ˈrɛθ rɔɪd /
any of several synthetic compounds that are similar to but more persistent than natural pyrethrins.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for pyrethroid
/ (paɪˈriːθrɔɪd) /
any of various chemical compounds having similar insecticidal properties to pyrethrin
of or relating to such compounds