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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"
adj.
containing or made of or resembling or characteristic of a metal; "a metallic compound"; "metallic luster"; "the strange metallic note of the meadow lark, suggesting the clash of vibrant blades"- Ambrose Bierce
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"