American Dictionary of the English Language

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ASCEN'SION, noun [Latin ascensio.]

1. The act of ascending; a rising. It is frequently applied to the visible elevation of our Savior to Heaven.

2. The thing rising, or ascending. [not authorized.]

3. In astronomy, ascension is either right or oblique. Right ascension of the sun or of a star, is that degree of the equinoctial, counted from the beginning of Aries, which rises with the sun or star, in a right sphere. Oblique ascension is an arch of the equator, intercepted between the first point of Aries, and that point of the equator which rises together with a star, in an oblique sphere.