noun
: a member of any system of coordinates used for locating a point on the celestial sphere — compare ecliptic coordinate , equator system of coordinate, galactic coordinate , horizon coordinate
noun
: a member of any system of coordinates used for locating a point on the celestial sphere — compare ecliptic coordinate , equator system of coordinate, galactic coordinate , horizon coordinate
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012