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picloram

American

[pik-luh-ram, pahy-kluh-] / ˈpɪk ləˌræm, ˈpaɪ klə- /

noun

Chemistry.

a colorless powder, C 6 H 3 Cl 3 N 2 O 2 , used as a systemic herbicide for controlling annual weeds and deep-rooted perennials on noncrop land.

1960–65; reverse compound from am(inotrich)lor(o)pic(olinic acid) ; see amino-, tri-, chloro- ², picolinic

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These include 2,4-D, dicamba, picloram, metsulfuron methyl, clopyralid and triasulfuron.

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023