ladanum
/ˈlædənəm/(亦作labdanum)
noun
mass noun
1- a gum resin obtained from the twigs of a southern European rock rose, used in perfumery and for fumigation劳丹脂, 半日花脂（岩蔷薇枝中提取的树胶脂, 用作芳香剂和熏蒸剂）。
1.1
- The rock rose is usually Cistus ladanifer, family Cistaceae.岩蔷薇拉丁名一般为Cistus ladanifer,半日花科。
词源
mid 16th cent.: via Latin from Greek ladanon, lēdanon, from lēdon 'mastic'.