Noun
- 1. guaiacum, natural resin
- usage: medicinal resin from the lignum vitae tree
- 2. lignum vitae, guaiac, guaiacum, wood
- usage: hard greenish-brown wood of the lignum vitae tree and other trees of the genus Guaiacum
- 3. Guaiacum, genus Guaiacum, rosid dicot genus
- usage: small genus of evergreen resinous trees or shrubs of warm and tropical America
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