CONVOLUTION

noun the act of rolling anything upon itself, or one thing upon another; a winding motion.

2. convolution ·noun an irregular, tortuous folding of an organ or part; as, the convolutions of the intestines; the cerebral convolutions. ·see brain.

3. convolution ·noun the state of being rolled upon itself, or rolled or doubled together; a tortuous or sinuous winding or fold, as of something rolled or folded upon itself.