circulus (redirected from Circulus arteriosus cerebri)

circulus /cir·cu·lus/ (-lus) pl. cir´culi   [L.] a circle.

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cir·cu·lus (sûrky-ls)

n. pl. cir·cu·li (-l)

1. A ringlike or circular structure.

2. A circle formed by connecting arteries, veins, or nerves.

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circulus

see circle.

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circulus arteriosus cerebri

the ring of arteries which serves as the major source of blood supply to the brain; a circle around the stalk of the pituitary gland ventral to thalamus; previously called circle of Willis.