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pyrethrin

Pronunciation: /pʌɪˈriːθrɪn/

Definition of pyrethrin

noun

Chemistry
  • any of a group of insecticidal compounds present in pyrethrum flowers: pyrethrins can cause allergic reactions [mass noun]:it contains natural pyrethrin

Origin:

1920s: from pyrethrum + -in1

pyrethrin in other Oxford dictionaries

Definition of pyrethrin in the US English dictionary
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