bescutcheon
/ˈbɛskʊtʃən/Definitions
1. noun
A metal plate, typically of iron or steel, attached to the shoulder or breast of a horse, often bearing a coat of arms.
“The horse’s bescutcheon was intricately engraved with the family crest.”
2. verb
To adorn or equip with a bescutcheon, especially on a horse.
“The blacksmith bescutcheoned the horse with a silver plate bearing the noble family’s emblem.”