1
: a gelatinous colloidal extract of a red alga (as of the genera Gelidium, Gracilaria, and Eucheuma) used especially in culture media or as a gelling and stabilizing agent in foods
2
: a culture medium containing agar

Examples of agar in a Sentence

Recent Examples on the Web Hesse never spoke about her role in introducing agar to the life sciences, though at least one scholarly work linked her name to agar during her lifetime. Corrado Nai, Smithsonian Magazine, 25 June 2024 The pineapple agar had a texture somewhere between gelatin and an overripe pear, rounding out the piña colada experience. The Indianapolis Star, 19 Jan. 2024 Hunters kill the birds, feral and domestic dogs chase them, people build shanties in their feeding grounds, locals gather red algae with ox carts and tractors to provide agar for the manufacture of cosmetics and pharmaceuticals, and piles of trash add to the constellation of threats. Jim Robbins, Smithsonian Magazine, 4 Jan. 2022 To make a piece of yeast art, the scientists print nanodroplets of the different yeast strains onto a large agar plate, like a pointillist canvas. Elizabeth Preston, Discover Magazine, 22 May 2017 Petri's dishes would be supplied with the gelatinous agar that served as a culture medium - providing anything from amino acids, salts, carbohydrates and blood - to encourage bacterial growth. Rebecca Kreston, Discover Magazine, 31 May 2013 Even artists that are used to more traditional media than bacteria on an agar plate could submit their favorite microbiologists. Eva Amsen, Forbes, 28 Dec. 2022 In short, do not eat mysterious agar plates in the laboratory and do not eat anything from your mother's suspicious boyfriend. Sarah Zhang, Discover Magazine, 16 Apr. 2012 Oud comes from the resin of certain agar trees that are infected with a type of mold. Grooming Playbook, The Salt Lake Tribune, 4 Nov. 2022

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'agar.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

short for Malay agar-agar, name for the red alga from which it is extracted

First Known Use

1885, in the meaning defined at sense 1

Time Traveler
The first known use of agar was in 1885

Dictionary Entries Near agar

Cite this Entry

“Agar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/agar. Accessed 14 Jul. 2024.

Kids Definition

agar

noun
variants also agar-agar
ˈäg-ə-ˈräg-ər
1
: a jellylike substance obtained from a red alga and used especially in culture media or to give firmness to foods
2
: a culture medium containing agar

Medical Definition

agar

noun
1
: a gelatinous colloidal extract of a red alga (as of the genera Gelidium, Gracilaria, and Eucheuma) used especially in culture media or as a gelling and stabilizing agent in foods
2
: a culture medium containing agar

More from Merriam-Webster on agar

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