ladanum

from WordNet (r) 3.0 (2006)

ladanum
    n 1: a soft blackish-brown resinous exudate from various
         rockroses used in perfumes especially as a fixative [syn:
         {labdanum}, {ladanum}]

from The Collaborative International Dictionary of English v.0.48

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}.]
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Rockrose \Rock"rose`\, n. (Bot.)
   A name given to any species of the genus {Helianthemum}, low
   shrubs or herbs with yellow flowers, especially the European
   {Helianthemum vulgare} and the American frostweed,
   {Helianthemum Canadense}.
   [1913 Webster]

   {Cretan rockrose}, a related shrub ({Cistus Creticus}), one
      of the plants yielding the fragrant gum called {ladanum}.
      [1913 Webster]

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