Open English Wordnet
Nouns
(n)armor plate, armour plate, armor plating, plate armor, plate armourspecially hardened steel plate used to protect fortifications or vehicles from enemy fire
(n)plate armor, plate armoura historical type of personal armor made from iron or steel plates, which superseded mail during the 14th century.“The increasing power and availability of firearms and the nature of large, state-supported infantry led to more portions of plate armour being cast off in favour of cheaper, more mobile troops.”