horizon glass

noun

Definitions

  1. A half-silvered piece of glass mounted in a quadrant or sextant, so that the horizon can…

    A half-silvered piece of glass mounted in a quadrant or sextant, so that the horizon can be seen at the same time as the reflection of a heavenly body.

    • On the morning of August 25, shortly after breaking camp, he looked back with his horizon glass and caught a majestic glimpse of Cabezon Peak […].

The neighborhood

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sense glosses and etymology drawn from English Wiktionary · source · CC-BY-SA