horizon glass

noun

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.

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Meanings

nounhorizon glass (plural horizon glasses)

plural horizon glasses

  1. historicalA 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 […].

    2006, Hampton Sides, Blood and Thunder, Abacus, published 2014, page 258
Cite this entry
APA

horizon glass. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/horizon%20glass

MLA

“horizon glass.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/horizon%20glass. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “horizon glass,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/horizon%20glass.

Source: horizon glass on Wiktionary, CC BY-SA 4.0.