sundial
B1Pronunciation
UK
- /sˈʌndaɪəl/
US
- /ˈsənˌdaɪl/
Description
- shadow clock
- solar timepiece
- ancient timekeeper
- sun-shadow dial
Imagine a world without digital clocks! For centuries, people told time using the sun and a clever device called a sundial. A sundial isn't about dialing a phone; it's a tool that uses the position of a shadow cast by a gnomon (a raised pointer) on a marked surface to show the time of day.
Sundials were especially important before mechanical clocks became common, and you can still find beautiful versions in gardens today. They aren't always perfectly accurate because cloudy days make them hard to use, but they offer a fascinating glimpse into how our ancestors measured time and connected with the natural world. A sundial isn't just for telling time; it's also a piece of history that reminds us of simpler ways to mark the passing hours.
A sundial is an instrument used to tell time by following the shadow cast by the sun. It consists of a flat, marked surface—often circular or square—and a raised pointer called a gnomon. As the sun moves across the sky, the gnomon casts a shadow onto the dial, showing the current hour.
The earliest sundials were simple vertical sticks or obelisks that cast shadows on the ground. Over time, they became more sophisticated, with intricate designs and markings calibrated to specific locations. Different cultures developed unique styles of sundials, from the elaborate bronze instruments used by the ancient Greeks and Romans to the portable pocket sundials favored during the Renaissance.
While incredibly useful for their era, sundials have limitations. They are dependent on sunlight, so they don't work at night or on cloudy days. Their accuracy can also be affected by latitude, longitude, and even the season. Despite these drawbacks, sundials remain a beautiful and historically significant way to measure time.
Today, sundials are often seen as decorative garden features or historical artifacts. They serve as a reminder of our connection to the sun and the ingenuity of those who came before us in their quest to understand and track the passage of time. So, next time you see a sundial, remember it's more than just a pretty object—it's a testament to human observation and a fascinating piece of technological history.
Examples
- 1
Garden feature
There was an old sundial in the middle of the garden.
Meaning
a sundial
a device that shows the time by the sun's shadow
- 2
School lesson
She learned how to read the sundial in the school courtyard.
- 3
Museum history
Several stone sundials from the Roman period are kept in the museum.
Forms and spellings
2 forms open this card.
Main spelling
- sundialnoun
Forms
- sundialspluralnoun