Source : Webster's Revised Unabridged Dictionary (1913)

Guaiac \Gua"iac\, a. [See {Guaiacum}.]
   Pertaining to, or resembling, guaiacum. -- n. Guaiacum.

Source : WordNet®

guaiac
     n : hard greenish-brown wood of the lignum vitae tree and other
         trees of the genus Guaiacum [syn: {lignum vitae}, {guaiacum}]