Related to Ascensional difference: Oblique ascension
|(Astron.)||the difference between oblique and right ascension; - used chiefly as expressing the difference between the time of the rising or setting of a body and six o'clock, or six hours from its meridian passage.|
|See under Ascensional.|
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.