gum tree

from WordNet (r) 3.0 (2006)

gum tree
    n 1: any of various trees of the genera Eucalyptus or
         Liquidambar or Nyssa that are sources of gum [syn: {gum
         tree}, {gum}]

from The Collaborative International Dictionary of English v.0.48

gum tree \gum" tree`\ n.
   Any tree that exudes a gum, such as:
   (a) The black gum ({Nyssa multiflora}), one of the largest
       trees of the Southern States, bearing a small blue fruit,
       the favorite food of the opossum. Most of the large trees
       become hollow.
   (b) A tree of the genus {Eucalyptus}; a eucalypt. See
       {Eucalpytus.}
   (c) The sweet gum tree of the United States ({Liquidambar
       styraciflua}), a large and beautiful tree with pointedly
       lobed leaves and woody burlike fruit. It exudes an
       aromatic terebinthine juice.
   (d) The sour gum tree.
       [1913 Webster]