CLAY n.
water, silica, and aluminia, as halloysite, bole, etc. -- Fire clay , a variety of clay, entirely free from lime, iron, or an alkali, and therefore infusible, and used for fire brick. -- Porcelain clay, a very pure variety, formed directly from the decomposition of feldspar, and often called kaolin. -- Potter's clay…
DREADNOUGHT n.
Any battleship having its main armament entirely of big guns all of one caliber. Since the Dreadnought was built, the caliber of the heaviest guns has increased from 12 in. to 13½ in., 14 in., and 15 in., and the displacement of the largest batteships from 18,000 tons to 30,000 tons and upwards. The term superdreadnou…