n :  any of three major convolutions of the external surface of the temporal lobe of a cerebral hemisphere that are arranged approximately horizontally with one above the other:  a  :  the one that is uppermost and borders the sylvian fissure - called also superior temporal gyrus   b  :  one lying in the middle between the other two - called also middle temporal gyrus   c  :  the lowest of the three - called also inferior temporal gyrus  .
 
 
 
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