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gum arabic

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noun
  1. a water-soluble, gummy exudate obtained from the acacia tree, especially Acacia senegal, used as an emulsifier, an adhesive, in inks, and in pharmaceuticals.
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Origin of gum arabic

Middle English word dating back to 1350–1400
Also called acacia, gum acacia.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for gum arabic

Historical Examples

  • Why didn't we try the Professor's gum-arabic, and save collodion!

    Harper's Young People, January 18, 1881

    Various

  • The solution of gum-arabic is made by simply adding water to it.

  • One might also try a glaze made with hide glue or gum-arabic.

  • The gum-arabic will prevent the chalk from cracking and falling off.

  • They are white, odourless substances, and are good substitutes for gum-arabic.


British Dictionary definitions for gum arabic

gum arabic

noun
  1. a gum exuded by certain acacia trees, esp Acacia senegal: used in the manufacture of ink, food thickeners, pills, emulsifiers, etcAlso called: acacia, gum acacia
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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

gum arabic in Science

gum arabic

  1. A gum exuded by various African trees of the genus Acacia, especially A. senegal. Gum arabic is used in the preparation of pills and emulsions, in the manufacture of adhesives and candies, and as a thickener and stabilizer of colloids. Gum arabic consists mostly of a mixture of oligosaccharides and heavy glycoproteins.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.