ironclad
adj. 1 clad or protected with iron. 2 impregnable. n. Hist. Warship protected by iron plates.
a. Clad in iron; protected or covered with iron, as a vessel for naval warfare.
adj. 1 clad or protected with iron. 2 impregnable. n. Hist. Warship protected by iron plates.
a. Clad in iron; protected or covered with iron, as a vessel for naval warfare.