picloram

noun

pi·clo·ram ˈpi-klə-ˌram

ˈpī-

: a systemic herbicide C₆H₃Cl₃N₂O₂ that is persistent in the soil

Word History

Etymology

picolinic acid (acid obtained by oxidation of picoline) + chlor- + amine

First Known Use

1965, in the meaning defined above

Time Traveler

The first known use of picloram was in 1965

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Browse Nearby Words

picky

picloram

picnic

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Cite this Entry

Style

“Picloram.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/picloram. Accessed 4 Nov. 2025.

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Medical Definition

picloram

noun

pi·clo·ram ˈpik-lə-ˌram

ˈpīk-

: a systemic herbicide C₆H₃Cl₃N₂O₂ that breaks down very slowly in the soil

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