As-cĕn'sion-al, a.

a. Relating to ascension; belonging to, or connected with, ascent; ascensive; 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. Brande.