Definition of red gum tree in US English:

red gum tree

noun

  • 1Any of several Australian eucalyptus trees that produce a red gum or have red heartwood; especially (also "river red gum tree") E. camaldulensis.

  • 2Chiefly US. More fully "American red gum tree". The sweet gum, Liquidambar styraciflua.

Origin

Mid 18th century (in an earlier sense). Partly from red gum + tree, and partly from red + gum-tree.

Pronunciation

red gum tree

/ˌrɛd ˈɡʌm triː/