Ladanum n. : 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.

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Taxonomy
Labdanum, resin, shrubs, free encyclopedia, ambergris, History, Goat, substance, Cistus creticus, Gum rockrose, herbal medicine, the pharaohs of ancient Egypt, odour, Labdane, endangered species, Perfume, Pharaoh, search.

Defination from the web:
Ladanum) Jump to: navigation, search. Labdanum is a sticky brown resin obtained from the shrubs Cistus ladanifer (western Mediterranean) and Cistus creticus (eastern Mediterranean), species of rockrose. ...