'Gyration' definitions:

Definition of 'gyration'

From: WordNet
noun
A single complete turn (axial or orbital); "the plane made three rotations before it crashed"; "the revolution of the earth about the sun takes one year" [syn: rotation, revolution, gyration]
noun
The act of rotating in a circle or spiral [syn: gyration, whirling]

Definition of 'Gyration'

From: GCIDE
  • Gyration \Gy*ra"tion\ (j[-i]*r[=a]"sh[u^]n), n.
  • 1. The act of turning or whirling, as around a fixed center; a circular or spiral motion; motion about an axis; rotation; revolution. [1913 Webster]
  • The gyrations of an ascending balloon. --De Quincey. [1913 Webster]
  • If a burning coal be nimbly moved round in a circle, with gyrations continually repeated, the whole circle will appear like fire. --Sir I. Newton. [1913 Webster]
  • 2. (Zool.) One of the whorls of a spiral univalve shell. [1913 Webster]
  • Center of gyration. (Mech.) See under Center.
  • Radius of gyration, the distance between the axis of a rotating body and its center of gyration. --Rankine. [1913 Webster]