\As*cen"sion*al\, a.
Relating to ascension; connected with ascent; ascensive;
tending upward; as, the ascensional power of a balloon.
{Ascensional difference} (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.