Lad"a*num (?), n. [L. ladanum, ledanum, Fr. (), (), fr. name of a shrub, mastic; cf. Per. ladan, laden. Cf. Laudanum.]

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.

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