red heat

noun

1. the temperature of a red-hot body.
2. the condition of being red-hot.

red heat

noun

1. the temperature at which a substance is red-hot
2. the state or condition of being red-hot

Word History and Origins

Origin of red heat¹

First recorded in 1680–90

Example Sentences

Water gas is made by placing coke in a vertical cylinder and heating the coke to a red heat.

From Project Gutenberg

At red heat, the little molecules can squeeze themselves through the crystalline interstices of quartz and steel.

From Project Gutenberg

The art of brazing is applied to metals which will withstand a red heat, and the joints so soldered have the strength of brass.

From Project Gutenberg

All these alloys appear to require annealing at a red heat before their resistances are anything like constant.

From Project Gutenberg

The precipitate, when well washed, is to be placed in a Hessian crucible, and exposed to a red heat for half an hour.

From Project Gutenberg