Invar

Take Invar, and allow of nickel and iron.

They found that Questar telescopes—used by hobbyists for more than half a century—fit the space perfectly, so they ordered a couple of custom ones fashioned out of Invar, a thermally stable nickel-iron alloy.

Invar, a nickel-steel alloy, which also has an extremely small coefficient of expansion, is used in making clock pendulums, which are unaffected by change of temperature.

Invar's knife found her heart, and she sank back dead.

I hope the meal was with you this day, thirty-five bolls,—for it was at Invar last night.