false horizon

noun

1. a line or plane that simulates the horizon, used in altitude-measuring devices or the like.

Word History and Origins

Origin of false horizon¹

First recorded in 1805–15

Example Sentences

A stratum of 243 false horizon separated the two sets of images.

From Project Gutenberg

They ranged southward to the point where vision failed against the false horizon of dull amber haze.

From Project Gutenberg