Descension
Descension , noun
[Old French descension, Latin descensio. See Descent.]
The act of going downward; descent; falling or sinking; declension; degradation.
Collocations (2)
Oblique descension (Astronomy) , the degree or arc of the equator which descends, with a celestial object, below the horizon of an oblique sphere.
Right descension , the degree or arc of the equator which descends below the horizon of a right sphere at the same time with the object. [Obsolete]