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Definition of Time ball
1. Noun. A large wooden or metal ball that drops at a predetermined time to enable sailors to check their marine chronometers from their boats offshore. ¹
¹ Source: wiktionary.com
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1. Noun. A large wooden or metal ball that drops at a predetermined time to enable sailors to check their marine chronometers from their boats offshore. ¹
¹ Source: wiktionary.com