- a tree, Nyssa sylvatica, of eastern North America, having elliptic leaves, dark-blue, berrylike fruit, and wood with a variety of commercial uses.
Origin of sour gum
An Americanism dating back to 1775–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for black gum
The leaves of the sour-gum, the first tree to turn, showed blood-red.Wild Folk