Home > Terms > English, UK (UE) > Crescent sundial
Crescent sundial
A modified form of universal-ring dial in which the ring is divided into two equal semicircular portions placed back to back. The division is made at the '12' marks, so that the semicircles face due east and west respectively when correctly set. The pinhole is replaced by the tip of a curved gnomon, which slides on a date scale.
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- Part of Speech: noun
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- Industry/Domain: Chronometry
- Category: Clock
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