Definition of gimballing:
(n) :
A device for suspending something, such as a ship's compass, so that it will remain level when its support is tipped.
(v) :
(transitive) To suspend using a gimbal or gimbals.
(v) :
(transitive, aerospace) To move a reaction engine about on a gimbal so as to obtain pitching and yawing correction moments.
(v) :
(intransitive) To swivel, move on an axis.