glyph·​o·​sate | \ ˈgli-fə-ˌsāt How to pronounce glyphosate (audio) , 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

His first priority is getting the Army Corps to stop using glyphosate, the active ingredient in Roundup. Los Angeles Times, "This activist bought 4.5 acres of the L.A. River just to have a stake in its revitalization," 5 Aug. 2019 Del Campo said lacking the ability to use glyphosate-containing products hasn’t been an issue for the parks department, adding that alternative organic products and manually picking the weeds has kept city facilities weed-free. Anthony Clark Carpio, Burbank Leader, "Alternative methods effective in killing weeds, Burbank officials say," 16 Aug. 2019 Bayer argues that studies have established that glyphosate is safe. A.j. Perez, USA TODAY, "Former NFL player and ESPN analyst Merril Hoge alleges weed killer Roundup caused lymphoma," 1 Aug. 2019 Bayer’s shares have plunged about 40% in the last 12 months amid concern over legal claims that Roundup and its main ingredient, glyphosate, can cause cancer. Los Angeles Times, "Bayer CEO opens door to settling Roundup cancer cases," 30 July 2019 Two other pesticides that the current administration allows are glyphosate and chlorpyrifos — both a threat to human health. Dp Opinion, The Denver Post, "Letters: Disappointment doesn’t lessen our love for country (7/22/19)," 22 July 2019 If any does, apply a glyphosate-only herbicide to it as a spray. Neil Sperry,, "When mondo grass attacks, put up a wall," 5 July 2019 And the lawyers also said Smith should have allowed evidence of the EPA’s recent decision to reaffirm its approval of glyphosate. Bob Egelko,, "Judge partly grants request to move some trials over Monsanto herbicide," 18 June 2019 Spray or paint the plants with an herbicide containing glyphosate. Ellen Nibali,, "Garden Q&A: Controlling horse nettle and coping with herbicide injury," 12 July 2019

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

Dictionary Entries near glyphosate








Statistics for glyphosate

Last Updated

9 Sep 2019

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).


one from the Upper Peninsula of Michigan

Get Word of the Day daily email!

Test Your Vocabulary

Musical Words Quiz

  • gramophone
  • Which word describes a musical performance marked by the absence of instrumental accompaniment?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!


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!