Cotyloid Joint is a term that refers to the hip joint in mammals. It is a complex synovial joint that connects the pelvis to the femur. The cotyloid joint is also known as the hip socket or acetabulum. There are several synonyms for cotyloid joint, including femoral head and acetabular joint. Other terms that are used include the hip articulation, hip joint, or simply the hip. These terms are used interchangeably to describe the same joint that is essential for motion and stability in the lower extremities. Understanding the synonyms for cotyloid joint is crucial for proper communication between healthcare professionals and patients.