from The Century Dictionary.
- noun In anatomy, one of a pair of muscles arising from the ischium, and accessory to the obturator internus, with the tendon of which they are inserted into the great trochanter of the femur.
Sorry, no etymologies found.
In England the gymel, or cantus gemellus (twin song), flourished at an even earlier date.
Such rings were known as Gemel or Gimmal rings, the word being derived from the Latin _gemellus_, twins.
search=between&searchmode=none germ. *twi-na- in ahd. zwinal, zwenel `gemellus', zwiniling m., mhd. zwiniln n.