Ladanum
Ladanum , noun
[Latin ladanum, ledanum, Greek la`danon, lh`danon, from lh^don name of a shrub, mastic; compare Per. lādan, lāden. Compare Laudanum.]
A gum resin gathered from certain Oriental species of Cistus. It has a pungent odor and is chiefly used in making plasters, and for fumigation.