The Collaborative International Dictionary of English v.0.48:
armor-clad \armor-clad\ armor-plated \armor-plated\ armour-plated \armour-plated\ armour-clad \armour-clad\adj. 1. 1 protected with a covering of armor. Syn: steel-plated. [WordNet 1.5]WordNet (r) 3.0 (2006):
armour-clad adj 1: covered with heavy steel; "armor-plated vehicles" [syn: armor-clad, armour-clad, armor-plated, armour- plated, steel-plated]