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n.
a tract of land enclosed for particular activities (sometimes paved and usually associated with buildings); "they opened a repair yard on the edge of town"
n.
a mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten; "brass is an alloy of zinc and copper"
n.
an alloy of mercury with another metal (usually silver) used by dentists to fill cavities in teeth; except for iron and platinum all metals dissolve in mercury and chemists refer to the resulting mercury mixtures as amalgams
n.
dregs consisting of solid particles (especially of coffee) that form a residue; "it is a Middle Eastern custom to read your future in your coffee grounds"