heat barrier

noun

Aerospace.

1. thermal barrier.

heat barrier

noun

1. another name for thermal barrier

Word History and Origins

Origin of heat barrier¹

First recorded in 1950–55

Example Sentences

The X-2, for instance, was designed to penetrate the “thermal thicket,” also known as the “heat barrier,” where conventional metals begin to melt, according to the New York Times.

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Others said later that space vehicles would never get through the heat barrier.

Read more on Project Gutenberg