Source : Webster's Revised Unabridged Dictionary (1913)

Gyre \Gyre\, n. [L. gyrus, Gr. ?, cf. ? round.]
   A circular motion, or a circle described by a moving body; a
   turn or revolution; a circuit.

         Quick and more quick he spins in giddy gyres. --Dryden.

         Still expanding and ascending gyres.     --Mrs.
                                                  Browning.

Gyre \Gyre\, v. t. & i. [Cf. OF. gyrer, girer. See {Gyrate}.]
   To turn round; to gyrate. [Obs.] --Bp. Hall. Drayton.

Source : WordNet®

gyre
     n : a round shape formed by a series of concentric circles [syn:
          {coil}, {whorl}, {roll}, {curl}, {curlicue}, {ringlet},
         {scroll}]