Elbow cop

Modern usage, normally used by the Society for Creative Anachronism for the term couter, it is the portion of armour which covers the elbow joints, usually integral to a complete arm harness. As part of a complete armour that covers the whole arm, it is known as a cannon. The term knee cop is also used to refer to the article of armour that covers just the knee, the correct historical term for this is poleyn.