noun Chemistry.
- any of a group of resins formed by the interaction of urea and formaldehyde under conditions that include heat and pH control: used chiefly in the manufacture of buttons, baking enamels, and for making fabrics wrinkle-resistant.
noun
- any one of a class of rigid odourless synthetic materials that are made from urea and formaldehyde and are used in electrical fittings, adhesives, laminates, and finishes for textiles