The Collaborative International Dictionary of English v.0.48:

Liquidambar \Liq"uid*am`bar\ (l[i^]k"w[i^]d*[a^]m`b[~e]r), n.
   [Liquid + amber.]
   1. (Bot.) A genus consisting of two species of tall trees
      having star-shaped leaves, and woody burlike fruit.
      Liquidambar styraciflua is the North American sweet
      qum, and Liquidambar Orientalis is found in Asia Minor.
      [1913 Webster]

   2. The balsamic juice which is obtained from these trees by
      incision. The liquid balsam of the Oriental tree is liquid
      storax.
      [1913 Webster]

WordNet (r) 3.0 (2006):

liquidambar
    n 1: aromatic exudate from the sweet gum tree [syn: sweet gum,
         liquidambar]
    2: any tree of the genus Liquidambar
    3: sweet gum [syn: genus Liquidambar, Liquidambar]