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.
More 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.
Definition of guaiac in:
- The British & World English dictionary