armring

noun

1. A ring worn on the arm.

   “They were worn by men rather than by women and pre-Viking repoussé-decorated gold foils from Sorte Muld, Bornholm, appear to show a man who is wearing armrings wielding a sword and a man with two rings on his upper arm.”

   “Odin examined the arm-ring, then pushed it onto his arm, up high on his biceps.”