Meaning of EQUATION in English

EQUATION

( n. )

A quantity to be applied in computing the mean place or other element of a celestial body; that is, any one of the several quantities to be added to, or taken from, its position as calculated on the hypothesis of a mean uniform motion, in order to find its true position as resulting from its actual and unequal motion.

Webster's Revised Unabridged English Dictionary.      Пересмотренный полный словарь английского языка Webster.