yellow gum noun4 •Any of various plants which produce a yellow resin, some of which are used medicinally. •(Australia) Any of various plants of eastern Australia, especially Xanthorrhoea resinosa and Eucalyptus leucoxylon; also (obsolete) the resin itself.‘See that yellow gum with the double trunk,’ says Jack, pointing, ‘remember him.’ — 1999 •Trees of genus Nyssa, of North America and Asia. •(Scotland) Melena or black jaundice in infants.
