upper cannon

English Thesaurus

1. cannon that provides plate armor for the upper arm (noun.artifact)

hypernym	:	cannon,
definition	:	(Middle Ages) a cylindrical piece of armor plate to protect the arm (noun.artifact)

part meronym	:	body armor, body armour, cataphract, coat of mail, suit of armor, suit of armour,
definition	:	armor that protects the wearer's whole body (noun.artifact)