The great circle on the celestial sphere that is the mean apparent path of the sun as viewed from the earth.
A great circle drawn on a terrestrial globe, used for illustrating and solving astronomical problems.
Also, the plane in which this great circle lies.
Relating to an eclipse or the ecliptic.
In the case of celestial bodies, the traversal of one body along an orbit around another body.
Consideration of an idea; the act of revolving something in the mind.
A political upheaval in a government or state characterized by great change.
A round of periodic changes, such as between the seasons of the year.
Rotation: the turning of an object around an axis, one complete turn of an object during rotation.
The removal and replacement of a government, especially by sudden violent action.
A sudden, vast change in a situation, a discipline, or the way of thinking and behaving.