I found an Italian astronomy site that used "Gemelli" where we use "Gemini". Also:
gimbals ['dʒýmbəlz, 'gým-]
pl n a device, consisting of two or three pivoted rings at right angles to each other, that provides free suspension in all planes for an object such as a gyroscope, compass, chronometer, etc.
Also called: gimbal ring
[ETYMOLOGY: 16th Century: variant of earlier gimmal finger ring, from Old French gemel, from Latin gemellus, diminutive of geminus twin]