- any of a genus (Guaiacum) of trees of the caltrop family native to tropical America, with blue or purple flowers and fruit growing in capsules
- the hard, dense wood of any of these trees
- guaiac (sense )
Origin of guaiacumModern Latin from Spanish guayaco from Taino guayacan
- Any of several tropical American trees of the genus Guaiacum; a lignum vitae.
- also guai·ac a. The wood of a guaiacum.b. A greenish-brown resin obtained from this tree, used medicinally and in varnishes.
Origin of guaiacumNew Latin from Spanish guayacán from Taíno
(usually uncountable, plural guaiacums)
Modern Latin, from Spanish guayacan.