n 1  cap  :  a genus (family Zygophyllaceae) of tropical American trees and shrubs having pinnate leaves, usu. blue flowers, and capsular fruit  2  :  any tree or shrub of the genus Guaiacum  3  :  a resin with a faint balsamic odor obtained as tears or masses from the trunk of either of two trees of the genus Guaiacum (G. officinale or G. sanctum) used formerly in medicine as a remedy for gout or rheumatism and now in various tests (as for peroxidases or blood stains) because of the formation of a blue color on oxidation - see GUAIAC TEST  .
 
 
 
Similar sounding terms:  kgm 
 
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