ladanum Meaning, Definition & Usage

  1. noun a soft blackish-brown resinous exudate from various rockroses used in perfumes especially as a fixative
    labdanum.

WordNet

Lad"a*num noun
Etymology
L. ladanum, ledanum, Fr. (), (), fr. name of a shrub, mastic; cf. Per. ladan, laden. Cf. Laudanum.
Definitions
  1. 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. Written also labdanum.

Webster 1913