black gum black·gum uncommon noun 1. columnar tree of eastern North America having horizontal limbs and small leaves that emerge late in spring and have brilliant color in early fall Synonymssour gumblack gumpepperidgeNyssa sylvatica 2. small mallee with rough dark-colored bark toward the butt yielding a red eucalyptus kino Synonymsblack malleeblack sallyblack gumEucalytus stellulata Related words Broader terms malleetupelo WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
