society > occupation and work > materials > derived or manufactured material > metal > metal in specific state or form > [noun] > cast metal > other parts of casting (3)
Technical senses (chiefly extended uses of sense 10). Metallurgy. A thin surface layer of a piece of metal that differs from the bulk metal in…
the metal in the head of a casting; cf. sense 44c, deadhead, n.1 2a.
Metallurgy. A localized region in molten metal that is of higher temperature and is slow to solidify; a region corresponding to this in an ingot or…