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mean solar day

noun

Definition of mean solar day

: the interval between successive transits of a given meridian by the mean sun

Examples of mean solar day in a Sentence

Recent Examples on the Web

 In the 19th century, scientific institutions worked to define the second in astronomical terms, and in the 1940s an international agreement defined the second as 1⁄86,400 of a mean solar day. — Jay Bennett, Popular Mechanics, "The Centuries-Long Quest to Measure One Second," 24 Mar. 2017

First Known Use of mean solar day

1816, in the meaning defined above

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