Astron.
the interval between two successive passages of the vernal equinox over the meridian, being about four minutes shorter than a mean solar day.
[ 1785-95 ]
Astron.
the interval between two successive passages of the vernal equinox over the meridian, being about four minutes shorter than a mean solar day.
[ 1785-95 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012