Definition of guaiac in English:

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guaiac

Pronunciation: /ˈɡwīak/

noun

Brown resin obtained from guaiacum trees, used as a flavoring and in varnishes. It was formerly used medicinally and as a test for traces of blood.
Example sentences
  • Mint flavoring compositions and wax-free gum bases are provided which are stabilized using gum guaiac, a naturally-occurring resin, as an antioxidant.

For editors and proofreaders

Syllabification: guai·ac

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