Definition of red gum:
(n) :
Eucalyptus camaldulensis (Murray red gum, river red gum), a eucalyptus tree with red wood.
(n) :
Any of several species of trees found in Australia:
(n) :
Corymbia calophylla (marri), native to Western Australia, with red gum effusions.
(n) :
Eucalyptus tereticornis (forest red gum), with red wood.
(n) :
Eucalyptus macrorhyncha (red stringybark, Cannon's stringybark, capertee stringybark)
(n) :
A tree of the hazel family, of species Liquidambar styraciflua, found in North America.