1. : a great circle perpendicular to the plane of the ecliptic
2. : a meridian of the terrestrial sphere along which latitude is measured ; sometimes : parallel of latitude
1. : a great circle perpendicular to the plane of the ecliptic
2. : a meridian of the terrestrial sphere along which latitude is measured ; sometimes : parallel of latitude
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012