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sun·di·al

/ˈsənˌdīəl/

noun
- 1. an instrument showing the time by the shadow of a pointer cast by the sun on to a plate marked with the hours of the day.
- 2. a mollusk with a flattened spiral shell that is typically patterned in shades of brown, living in tropical and subtropical seas.
Scrabble Points: 8
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More definitions, origin and scrabble points

Sundial
A sundial is a horological device that tells the time of day when direct sunlight shines by the apparent position of the Sun in the sky. In the narrowest sense of the word, it consists of a flat plate (the dial) and a gnomon, which casts a shadow onto the dial. As the Sun appears to move through the sky, the shadow aligns with different hour-lines, which are marked on the dial to indicate the time... Wikipedia
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