/ ˌkɒnvəˈluːʃn; NAmE ˌkɑːn-/ noun [ usually pl. ] ( formal )
1.
a thing that is very complicated and difficult to follow :
the bizarre convolutions of the story
2.
a twist or curve, especially one of many :
the convolutions of the brain
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WORD ORIGIN
mid 16th cent.: from medieval Latin convolutio(n-) , from convolvere roll together, from con- together + volvere roll.