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"
a United States coin worth one twentieth of a dollar
five dollars worth of a drug; "a nickel bag of drugs"; "a nickel deck of heroin"
a hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and millerite