circle of Willis
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Related to Arterial circle of Willis: posterior cerebral artery, anterior cerebral artery, Posterior communicating artery, Anterior communicating artery, Vertebral arteries
circle of Willis
[′sər·kəl əv ′wil·əs] (anatomy)
A ring of arteries at the base of the cerebrum.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.