superalloy

[ soo-per-al-oi ]
/ ˈsu pərˌæl ɔɪ /

noun

an alloy, often with a nickel, nickel-iron, or cobalt base, capable of withstanding very high temperatures, used in jet engines, rockets, etc.

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Origin of superalloy

First recorded in 1945–50; super- + alloy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020