n. [ Gr. gy^ros ring, circle + "ista`nai to cause to stand.] (Physics) A modification of the gyroscope, consisting essentially of a fly wheel fixed inside a rigid case to which is attached a thin flange of metal for supporting the instrument. It is used in studying the dynamics of rotating bodies. [1913 Webster]

a. (Physics) Of or pertaining to the gyrostat or to gyrostatics. [ 1913 Webster ]

n. (Physics) The doctrine or theory of the gyrostat, or of the phenomena of rotating bodies. [ 1913 Webster ]