plaquet

Noun

 * , a metal plate reinforcing the lower part of an armor breastplate or backplate.
 * 1) * 1899, Leicester (England), Records of the Borough of Leicester: 1103-1327, page 340:
 * The plate of steel used as additional defence, and specifically the doubling of the lower part of the breastplate; a similar plaquet was used for the back.
 * The plate of steel used as additional defence, and specifically the doubling of the lower part of the breastplate; a similar plaquet was used for the back.