sour gum is a noun meaning "columnar tree of eastern North America having horizontal limbs and small leaves that emerge late in spring and have brilliant color in early fall". It carries one recorded sense.
columnar tree of eastern North America having horizontal limbs and small leaves that emerge late in spring and have brilliant color in early fall
Definitions, synonyms and semantic relations for sour gum come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.