meridian angle difference
meridian angle difference[mə′rid·ē·ən ¦aŋ·gəl ′dif·rəns]
The difference between two meridian angles, particularly between the meridian angle of a celestial body and the value used as an argument for entering into a table. Also called hour angle difference.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.