guaiac

Definitions of guaiac
  1. noun
    hard greenish-brown wood of the lignum vitae tree and other trees of the genus Guaiacum
    synonyms: guaiacum, lignum vitae
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    type of:
    wood
    the hard fibrous lignified substance under the bark of trees
  2. noun
    a resin obtained from the guaiacum tree and used for various purposes, most commonly in chemical tests to detect hidden blood
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