👉 An invisible fluid, often referred to as a lubricant or lubricant-like substance, is a substance that reduces friction between surfaces in contact without being visible to the naked eye. It can be found naturally in biological systems, like synovial fluid in joints, which helps to minimize wear and tear, or artificially in mechanical systems, such as hydraulic fluids, which enable smooth operation by reducing resistance. This invisible fluid plays a crucial role in facilitating movement and efficiency in various contexts, from the human body to complex machinery.
