horizon glass
horizon glass · horizon glasses
A half-silvered piece of glass mounted in a quadrant or sextant, so that the horizon…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.
Meaning
1 senses(historical)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.
Forms
plural: horizon glasses| Singular | horizon glass |
|---|---|
| Plural | horizon glasses |
regular