hour circle
noun
: a circle on the celestial sphere that passes through both celestial poles
Example Sentences
Recent Examples on the Web But all of the watches will keep exacting time, and display it on a Roman numeral hour circle and an Arabic numeral minute track on a silvered disk. 
Demetrius Simms, Robb Report, 20 July 2022 Instead of storming the stores or spending hours circling some parking garage, everyone would take a long winter’s nap. Chris Erskine, latimes.com, 1 Dec. 2017
Demetrius Simms, Robb Report, 20 July 2022 Instead of storming the stores or spending hours circling some parking garage, everyone would take a long winter’s nap. Chris Erskine, latimes.com, 1 Dec. 2017 Word History
First Known Use
1690, in the meaning defined above
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