Definitions
1.nounA very hard brick used for paving customarily made in the Netherlands.
2.nounA mass of bricks fused together by intense heat.
3.nounSlag or ash produced by intense heat in a furnace, kiln or boiler that forms a hard residue upon cooling.
4.nounAn intermediate product in the manufacture of Portland cement, obtained by sintering limestone and alumino-silicate materials such as clay into nodules in a cement kiln.
5.nounHardened volcanic lava.
6.nounA scum of oxide of iron formed in forging.
7.verbTo convert or be converted into clinker.