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trichlorophenoxyacetic acid

American  
[trahy-klawr-oh-fuh-nok-see-uh-see-tik, -set-ik, -klohr-, -klawr-, -klohr-] / traɪˈklɔr oʊ fəˌnɒk si əˈsi tɪk, -ˈsɛt ɪk, -ˈkloʊr-, -ˌklɔr-, -ˌkloʊr- /

noun

Chemistry.

  1. a light-tan, water-insoluble solid, C 8 H 5 Cl 3 O 3 , used chiefly for killing weeds.

trichlorophenoxyacetic acid British  
/ traɪˈklɔːrəʊfəˌnɒksɪəˈsiːtɪk /

noun

  1. Also called: 2,4,5-T.  an insoluble crystalline solid; 2,4,5-trichlorophenoxyacetic acid. It is a plant hormone and is used as a weedkiller. Formula: C 8 H 5 Cl 3 O 3

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of trichlorophenoxyacetic acid

tri- + chloro- 2 + phen(o)- + oxy- 2 + acetic acid

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Sure enough, there’s plenty dichlorophenoxyacetic acid as well as trichlorophenoxyacetic acid stocked in the lab.

From Literature

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.