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gyrus
gy·rus [ jrəss ] (plural gy·ri [ j r ])


noun 
Definition:
 
ridge of brain cortex: a rounded ridge on the outer layer of the brain
[Mid-19th century. Via Latin, "circle" < Greek guros "ring, circle"]
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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