Medical Dictionary
circle
noun cir·cle \ˈsər-kəl\
Medical Definition of CIRCLE
1
a : a closed plane curve every point of which is equidistant from a fixed point within the curve b : the plane surface bounded by such a curve
2
: something (as an anatomical part) in the form of a circle or section of a circle <an arterial circle>—see circle of willis
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