1. circumferential formation of arteries and/or veins.
2. the circle around the mouth formed by the inferior and superior labial arteries;
3. Synonym(s): areolar venous plexus
Synonym(s): circulus vasculosus [TA]
vascular circle(1) Areolar venous plexus; plexus venosus areolaris [NA].
(2) The anastomosing vascular network formed by the inferior and superior labial arteries.