n.a soft blackish-brown resinous exudate from various rockroses used in perfumes especially as a fixative
同义词：labdanum
英汉双解大词典
labdanum/ˈlæbdənəm/(alsoladanum)
1.
N（名词）
a dark resinous juice obtained from various rockroses of the genus Cistus, used in perfumery and in the manufacture of fumigants and medicinal plasters 劳丹脂