[gwahy-ak] 
| 1. | Also called guaiacum gum, gum guaiac. a greenish-brown resin obtained from the guaiacum tree, esp. from Guaiacum officinale, used in varnishes, as a food preservative, and in medicine in various tests for the presence of blood. |
| 2. | guaiacum (def. 2). |
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