Rotary joints are a vital component of rotating machinery, providing a connection for fluid or gas to flow through rotating surfaces, pipes, and other rotating parts. However, depending on the context, the term 'rotary joint' may not be the most appropriate description. There are a variety of synonyms that can be used depending on the application, including rotary coupling, rotary union, rotatable manifold, swivel joint, rotating joint, slip ring, and rotating connector. Each of these terms can be used interchangeably with rotary joint and may better suit the specific industry or device in question. Whether in aerospace, manufacturing, or automotive industries, proper terminology is essential for clear communication and effective operation of complex machinery.