单词	mean solar day
释义	mean solar day noun : the interval between successive transits of a given meridian of longitude by the mean sun The confusion wasn't resolved for good until 1884, when an international time conference in Washington, D.C., replaced the old-fashioned solar day with the mean solar day—a legal fiction in which the daily fluctuations are averaged out, enabling us to enjoy the blessings of a uniform 24-hour day all year long. Jon Vara Example Sentences 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, 24 Mar. 2017 Word History First Known Use 1810, in the meaning defined above
随便看	agau Agavaceae agavaceaes agave agave cactus agaves agaveworm agavose Agaw Agawam Agaz agaze agazed agazer agazest agba agbada agbadas AGC Agchylostoma agcy agd agdistes agdistises agdistisses

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