An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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lunar day
  روز ِ مانگ، ~ ِ مانگی  
ruz-e mâng, ~ mângi
Fr.: jour lunaire  

The interval between two successive sunrises for an observer standing on the Moon. This is not the rotational period of the Moon, because the Moon-Earth system has moved round the Sun during that period. It is equal to the length of a → synodic month (29.5306 days).

See also: → lunar; → day.