Noun red elm has 2 senses
  1. September elm, red elm, Ulmus serotina - autumn-flowering elm of southeastern United States
    --1 is a kind of elm, elm tree
    --1 is a member of Ulmus, genus Ulmus
  2. slippery elm, red elm, Ulmus rubra - North American elm having rough leaves that are red when opening; yields a hard wood
    --2 is a kind of elm, elm tree
    --2 is a member of Ulmus, genus Ulmus
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