gyration

gyrate +‎ -ion

• IPA^(key): /dʒaɪˈɹeɪʃən/

• Rhymes: -eɪʃən

gyration (plural gyrations)

1. The act of turning or whirling, as around a fixed center; a circular or spiral motion; motion about an axis; rotation; revolution.
   • 1881, Symon's monthly meteorological magazine (page 59)

     If you question a seaman on the subject, whether mere coaster or circumnavigator, he will tell you that in a snow-storm, because of its constant eddyings and gyrations, frequent trimming of sails is more necessary than in any other gale […]

2. One of the whorls of a spiral univalve shell.
3. Appropriate arrangement of convolutions of gyri in the cerebral cortex.

• gyrification

• organity