De*scen"sion (?), n. [OF. descension, L. descensio. See Descent.]

The act of going downward; descent; falling or sinking; declension; degradation.

Oblique descension Astron., 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. [Obs.]

 

© Webster 1913.

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