Ladanum \Lad"a*num\, n. [L. ladanum, ledanum, Gr. la`danon,
lh`danon, fr. lh^don name of a shrub, mastic; cf. Per.
l[=a]dan, l[=a]den. 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.]
Source: Webster's Revised Unabridged Dictionary (1913)
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