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.

From Washington Post

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

From Project Gutenberg