Cardan refers to a type of mechanical device known as a Cardan joint, which allows for the transmission of rotary motion between two shafts that are not in line with each other. This joint is commonly used in vehicles and machinery to enable smooth movement and flexibility, accommodating changes in angle and alignment. The term "Cardan" is also associated with Gerolamo Cardano, a 16th-century Italian mathematician and physician. He made significant contributions to algebra and is known for his work on Cardano's formula, which provides a method for solving cubic equations. His innovations laid the groundwork for future developments in mathematics.