com·mu·ni·cat·ing artery (k -my  n -k  tng)n. 1. An artery that connects two larger arteries. 2. A short artery joining the two anterior cerebral arteries and completing anteriorly the circle of Willis; anterior communicating artery. 3. An artery with origin in the internal carotid artery, with distribution to the optic tract, cerebral peduncle, and hippocampal gyrus; and with anastomoses with the posterior cerebral artery to form the circle of Willis; posterior communicating artery. |
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