Guaiac Definition
 gwīak 
    noun
  
 A greenish-brown resin from the wood of two species of guaiacum (Guaiacum sanctum and G. officinale) used as a reagent in tests for blood traces, in varnishes, etc.
 Webster's New World 
Webster's New World 
Synonyms: 
  Other Word Forms of Guaiac
Noun
Singular:
 guaiacPlural:
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