LABDANUM
labdanum, ladanum
(noun) a soft blackish-brown resinous exudate from various rockroses used in perfumes especially as a fixative
labdanum, gum labdanum
(noun) 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
Source: WordNet® 3.1
Etymology
Noun
labdanum (usually uncountable, plural labdanums)
A sticky brown resin obtained from species of rockrose, used mainly in perfume.
Source: Wiktionary
Lab"da*num, n. (Bot.)
Definition: See Ladanum.
Source: Webster’s Unabridged Dictionary 1913 Edition