- lignum vitae, Guaiacum officinale - small evergreen tree of Caribbean and southern Central America to northern South America; a source of lignum vitae wood, hardest of commercial timbers, and a medicinal resin
--1 is a kind of angiospermous tree, flowering tree
--1 is a member of Guaiacum, genus Guaiacum
--1 has substances: lignum vitae, guaiac, guaiacum; guaiacum