a bitter, bad-smelling Asiatic gum resin, obtained from various plants (genus Ferula) of the umbel family, formerly used in medicine
See galbanum in American Heritage Dictionary 4
(gălˈbə-nəm, gôlˈ-)
noun
A bitter, aromatic gum resin extracted from an Asiatic plant (Ferula galbaniflua) or any of several related plants and used in incense and medicinally as a counterirritant.