- Ulmaceae, family Ulmaceae, elm family - a dicot family of the order Urticales including: genera Ulmus; Celtis; Planera; Trema
--1 is a kind of dicot family, magnoliopsid family
--1 is a member of Urticales, order Urticales
--1 has members:Ulmus, genus Ulmus; Celtis, genus Celtis; Planera, genus Planera; Trema, genus Trema