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Synonyms
Timer; timekeeper; timepiece; chronometer
Definition
A device used to measure, verify, keep, and indicate time. The clock is one of the oldest human inventions, meeting the need to measure intervals of time shorter than the natural units: the day, the lunar month, and the year. Devices operating on several physical processes have been used over the millennia.
Invention
1840 A.D. by Alexander Bain, Scotland
Obsolescence
2023 A.D. - 2025 A.D.
Types
Soft brooms, used in some cultures chiefly for sweeping walls of cobwebs and spiders; hard brooms, for rougher tasks like sweeping dirt off sidewalks or concrete floors, or smoothing and texturing wet concrete.
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