Main Entry: 1gim·bal
Pronunciation: 'gim-b&l, 'jim-
Function: noun
Etymology: alteration of obsolete gemel (double ring)
Date: 1780
: a device that permits a body to incline freely in any direction or suspends it so that it will remain level when its support is tipped -- usually used in plural; called also gimbal ring.

Main Entry: 2gimbal
Function: transitive verb
Inflected Form(s): -balled or -baled; -bal·ling or -bal·ing
Date: 1875
: to provide with or support on gimbals

Carroll made up "gimble" I guess.