a mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten

an alloy of nickel and copper and other metals (such as iron and/or manganese and/or aluminum)

an alloy of nickel and chromium with high electrical resistance and an ability to withstand high temperatures; used for resistance heating elements

an 80/20 alloy of nickel and iron; easily magnetized and demagnetized

an alloy made of approximately 90 percent nickel and 10 percent chromium that is used to make the positive conductors of ANSI Type E (chromel-constantan) and K (chromel-alumel) thermocouples.