- guaiacum - medicinal resin from the lignum vitae tree
--1 is a kind of natural resin
--1 is a substance of lignum vitae, Guaiacum officinale- lignum vitae, guaiac, guaiacum - hard greenish-brown wood of the lignum vitae tree and other trees of the genus Guaiacum
--2 is a kind of wood
--2 is a substance of lignum vitae, Guaiacum officinale- Guaiacum, genus Guaiacum - small genus of evergreen resinous trees or shrubs of warm and tropical America
--3 is a kind of rosid dicot genus
--3 is a member of Zygophyllaceae, family Zygophyllaceae, bean-caper family
--3 has members:lignum vitae, Guaiacum officinale; bastard lignum vitae, Guaiacum sanctum - lignum vitae, guaiac, guaiacum - hard greenish-brown wood of the lignum vitae tree and other trees of the genus Guaiacum