1. : the angle made by a descending line or plane with a horizontal plane
2. : the angle between the direction indicated by a magnetic needle and the true meridian — called also magnetic declination
1. : the angle made by a descending line or plane with a horizontal plane
2. : the angle between the direction indicated by a magnetic needle and the true meridian — called also magnetic declination
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012