tirret

noun

1. A manacle, shackle, or swivel.

   “Sinister, an unicorn, argent; armed, unguled, mained, tufted, ducally collared, or; on the shoulder, a tirret, or. MOTTO.”

   “A bendlet between two tirrets, over all a lion, rampant. […] On the Shield of dripstone^([sic]) of Door, a rose within a wreath; the tirrets are profusely used on the wooden ceiling and in the moulding, both external and internal. The wreath is also met with several times.”

   “[…] tufted, ducally gorged, with chain reflexed over the back, & charged on the shoulder with a tirret or.”