What describes equipment, materials, or products with a label from a recognized testing laboratory?

The term that accurately describes equipment, materials, or products that have a label from a recognized testing laboratory is "listed." When an item is listed, it means that it has been evaluated by a recognized organization to meet specific safety standards and performance criteria. This process ensures that the product is reliable and suitable for its intended use.

A "labeled" item could suggest that it has met certain labeling requirements, but it does not necessarily indicate that it has undergone the same rigorous testing and certification process as a listed product. "Approved" generally refers to a broader acceptance by authorities having jurisdiction, but again, it doesn't specify the testing and evaluation process. "Registered" usually pertains to the documentation of a product's specifications and does not inherently imply that it has been tested for safety or performance in the way that "listed" does.

Thus, the correct term that captures the essence of what a label from a recognized testing laboratory signifies is "listed."