Dictionary![]() ![]() gum' ar'abica water-soluble, gummy exudate obtained from the acacia tree, esp. Acacia senegal, used as an emulsifier, an adhesive, in inks, and in pharmaceuticals. Also called acacia, gum' aca'cia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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