guaiac

noun4

1. •
   Guaiacum (tree, wood or resin of the guaiacum tree)
2. •
   A paper treated with alpha-guaiaconic acid, used in tests to detect blood in the faeces.
3. •
   Oil of guaiac, a fragrance ingredient used in soap and perfumery distilled from the palo santo tree.
4. •
   Guaiacol.