The cerebral arterial circle, also known as the Circle of Willis, is an important arterial structure located at the base of the brain. It is responsible for supplying blood to the brain and its surrounding structures. There are several synonyms for the cerebral arterial circle, including the circulus arteriosus cerebri, Willis' circle, and the arterial circle of the brain. These terms all refer to the same structure and are used interchangeably in medical literature. Understanding the various synonyms for the cerebral arterial circle is important for accurate communication between healthcare providers and medical professionals, as well as for patient education.