glyph·o·sate | \ˈgli-fə-ˌsāt, ˈglī-\

Definition of glyphosate 

: a systemic organophosphate herbicide C3H8NO5P used to control herbaceous and woody weeds especially on croplands

Examples of glyphosate in a Sentence

Recent Examples on the Web

Many government regulators have rejected a link between cancer and glyphosate. Sudhin Thanawala, The Seattle Times, "Lawsuits alleging Roundup caused cancer can move forward," 10 July 2018 California already considers the Roundup’s active ingredient, glyphosate, to be a carcinogen, as does the World Health Organization’s International Agency for Research on Cancer. Lucas Laursen, Fortune, "Why Monsanto Could Soon Get Hit With a Flood of Cancer-Related Lawsuits," 11 July 2018 Cancer experts disagree, often strongly, on whether either talc or glyphosate, the main ingredient in Roundup, causes cancer in people. NBC News, "Johnson & Johnson talc verdict goes against what is known about cancer," 13 July 2018 Dewayne Johnson used Roundup during his two years as a groundskeeper and blames his 2014 cancer diagnosis on its active ingredient, glyphosate. CBS News, "Monsanto faces its first trial over allegations Roundup ingredient caused cancer," 19 June 2018 There is conflicted evidence linking glyphosate and cancer. Ashley May, USA TODAY, "Lawsuits alleging weed killer Roundup caused cancer given green light by San Francisco judge," 11 July 2018 The ingredient in question is glyphosate, which California added to a list of chemicals known to cause cancer just last year. Brittany Shoot, Fortune, "Monsanto's Roundup Is on Trial. The Charge: Causing Cancer," 10 July 2018 The company estimates that its seeds, engineered to resist glyphosate as well as dicamba, will be planted on 40 million acres nationwide this year. Paul Feldman, kansascity, "High-stakes battle over dicamba pesticide pits farmer against farmer | The Kansas City Star," 3 May 2018 Citywide use of glyphosate has decreased by about 85% since the 2013-14 fiscal year, according to staff, and has been replaced with organic materials and increased use of mulch to prevent weeds from sprouting in planters and tree wells. Luke Money,, "Residents urge Costa Mesa to eliminate local use of synthetic pesticides," 14 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'glyphosate.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of glyphosate

1972, in the meaning defined above

History and Etymology for glyphosate

perhaps from International Scientific Vocabulary glycine + phosph- + -ate entry 1

Keep scrolling for more

Learn More about glyphosate

Share glyphosate

Dictionary Entries near glyphosate








Statistics for glyphosate

Last Updated

7 Oct 2018

Look-up Popularity

Time Traveler for glyphosate

The first known use of glyphosate was in 1972

See more words from the same year

Comments on glyphosate

What made you want to look up glyphosate? Please tell us where you read or heard it (including the quote, if possible).


not any or not one

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!