armill

noun4

1. •
   A bracelet used in royal coronations, especially that of the monarch of the United Kingdom (symbolically known as a "bracelet of wisdom and sincerity")

   • The Candidate for membership of Hof, Garth or Hearth shall hold an Armill, or he may touch an unsheathed Sword throughout the ceremony. — 2014
2. •
   (historical) An ancient astronomical instrument, having either one ring placed in the plane of the equator for determining the time of the equinoxes (an equinoctial armil) or two or more rings, one in the plane of the meridian, for observing the solstices (a solstitial armil).

   • The Armill, Astrolabe, Dioptra, and Parallactic Instrument of the ancients were some of the instruments thus constructed. — 1840
3. •
   A silken stole worn around the neck by royalty.

   • Then the King arising, the Dean of Westminster takes the Armill from the Master of the great Wardrobe , and putteth it about His Majesty's Neck[…] — 1727
4. •
   (no longer used) Any bracelet or armlet.