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[ah-gahr, ag-er] /ˈɑ gɑr, ˈæg ər/
Also, agar-agar. Also called Chinese gelatin, Chinese isinglass, Japanese gelatin, Japanese isinglass. a gelatinlike product of certain seaweeds, used for solidifying certain culture media, as a thickening agent for ice cream and other foods, as a substitute for gelatin, in adhesives, as an emulsifier, etc.
Biology. a culture medium having an agar base.
Origin of agar
First recorded in 1885-90, agar is from the Malay word agaragar seaweed from which a gelatin is rendered, or the gelatin itself


[ey-gahr] /ˈeɪ gɑr/
noun, Douay Bible.
1. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for agar
Contemporary Examples
Historical Examples
  • I coughed, and agar, who had taken my arm-chair, wanted to give it me back.

    My Double Life Sarah Bernhardt
  • On leaving my two friends I drove straight to agar's to tell her what had happened.

    My Double Life Sarah Bernhardt
  • agar was to be introduced by Princess Mathilde, to whom she was then sitting as Minerva.

    My Double Life Sarah Bernhardt
  • Bring some more cakes, and tell Miss agar to come and pour out the tea.

    Olive in Italy Moray Dalton
  • Weigh out French maltose, 40 grammes, and dissolve in the agar.

  • Pour plates from the agar tubes; label, and incubate at 37° C.

  • We have also spoken of the servant agar, by whom Abraham had a son, and of how Abraham treated them both.

    Instigations Ezra Pound
  • Turk, a whirlpool; but perhaps the name of an office from agar, a saddle.

    The Bbur-nma in English

    Babur, Emperor of Hindustan
  • This is true of variations in the amount of moisture on agar plates.

    The Fundamentals of Bacteriology Charles Bradfield Morrey
British Dictionary definitions for agar


a complex gelatinous carbohydrate obtained from seaweeds, esp those of the genus Gelidium, used as a culture medium for bacteria, a laxative, in food such as ice cream as a thickening agent (E406), etc Also called agar-agar
Word Origin
C19: Malay
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
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agar in Medicine

agar a·gar (ā'gär', ä'gär') or a·gar-a·gar (ā'gär-ā'gär', ä'gär-ä'-)

  1. A gelatinous material derived from marine algae, used as a base for bacterial culture media and as a stabilizer and thickener in food.

  2. A culture medium containing this material.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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agar in Science
  (ā'gär', ä'gär')   
A gelatinous material obtained from marine algae, especially seaweed, used as a medium for growing bacterial cultures in the laboratory and as a thickener and stabilizer in food products.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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