1. a dark brown to greenish oleoresin that has a fragrant odor and is used as a fixative in perfumes; obtained as a juice from certain rockroses • Syn: gum labdanum • Hypernyms: oleoresin 2. a soft blackish-brown resinous exudate from various rockroses used in perfumes especially as a fixative • Syn: ladanum • Hypernyms: oleoresin • Substance Holonyms: common gum cistus, Cistus ladanifer, Cistus ladanum