gy·rus /ˈʤaɪrəs/
  迴轉,腦回
  gy·rus /ˈʤaɪrəs/ 名詞
  (複gyri)(腦)回
  Gy·rus n.; pl. Gyri   A convoluted ridge between grooves; a convolution; as, the gyri of the brain; the gyri of brain coral.  See Brain.
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  gyrus
       n : a convex fold or elevation in the surface of the brain [syn:
            convolution]
       [also: gyri (pl)]