gum tree, gum - any of various trees of the genera Eucalyptus or Liquidambar or Nyssa that are sources of gum

genus Eucalyptus - tall trees native to the Australian region; source of timber and medicinal oils from the aromatic leaves

eucalyptus - wood of any of various eucalyptus trees valued as timber

flooded gum - any of several Australian gum trees growing on moist or alluvial soil

mallee - any of several low-growing Australian eucalypts

stringybark - any of several Australian eucalypts having fibrous inner bark

smoothbark - any of several Australian eucalypts having the bark smooth except at or near the base of the trunk

Eucalyptus amygdalina, peppermint gum, peppermint, red gum - red gum tree of Tasmania

Eucalyptus calophylla, marri, red gum - very large red gum tree

Eucalyptus camaldulensis, Eucalyptus rostrata, river gum, river red gum - somewhat crooked red gum tree growing chiefly along rivers; has durable reddish lumber used in heavy construction

Eucalyptus camphora, mountain swamp gum - medium-sized swamp gum of New South Wales and Victoria

Eucalyptus coriacea, Eucalyptus pauciflora, ghost gum, snow gum, white ash - small to medium-sized tree of Australia and Tasmania having smooth white to light-grey bark shedding in patches or strips

alpine ash, Eucalyptus delegatensis, mountain oak - tall timber tree with hard heavy pinkish or light brown wood

Eucalyptus fraxinoides, white mountain ash - large tree with dark compact bark on lower trunk but smooth and white above; yields lumber similar to that of European or American ashes

blue gum, Eucalyptus globulus, fever tree - tall fast-growing timber tree with leaves containing a medicinal oil; young leaves are bluish

Eucalypt ovata, swamp gum - medium-sized tree of southern Australia

Eucalyptus maculata, spotted gum - large gum tree with mottled bark

Eucalyptus citriodora, Eucalyptus maculata citriodora, lemon-scented gum - similar to but smaller than the spotted gum and having lemon-scented leaves

Eucalyptus regnans, mountain ash - tree having wood similar to the alpine ash; tallest tree in Australia and tallest hardwood in the world

Eucalyptus viminalis, manna gum - tall tree yielding a false manna