|gwīə|kän noun
( -s )
Etymology: Spanish guayacán — more at guaiacum
1. : any of several So. and Central American timber trees typically with strong dense hard wood: as
a. : any of certain lignum vitae of the genus Guaiacum (especially G. sanctum )
b. : any of certain trees of the genus Tabebuia
c. : an Argentine tree ( Caesalpinia melanocarpa ) yielding a timber used for railway ties, paving, and heavy construction
d. : guaiacum wood
2. : guaiacum 2