Astron.
a great circle on the celestial sphere passing through the celestial poles and containing a point on the celestial sphere, as a star or the vernal equinox. Also called circle of declination .
[ 1665-75 ]
HOUR CIRCLE
Meaning of HOUR CIRCLE in English
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012