What is meant by descriptions such as TC treated/no TC treated that appear in product descriptions such as cell culture dishes?

What is meant by descriptions such as TC treated/no TC treated that appear in product descriptions such as cell culture dishes?

TC-treated means to treat the surface of tissue cultured. It enhances the hydrophilicity of polystyrene (PS) surface by corona discharge or gas plasma, and improves the adhesion of proteins required for cell adhesion to help cells adhere to the wall.