circulus arteriosus circulus arteriosus circulus arteriosus may refer to circulus arteriosus major, an anastomosis of the anterior ciliary arteries circulus arteriosus minor, an arterial circle near the pupillary margin of the iris circle of willis, also known as circulus arteriosus cerebri this article is issued from wikipedia. the text is licensed under creative commons - attribution - sharealike. additional terms may apply for the media files.