exmeridian observation

exmeridian observation

[eks·mə′rid·ē·ən ‚äb·zər′vā·shən]
(astronomy)
Measurement of the altitude of a celestial body near the celestial meridian of the observer, for conversion to a meridian altitude.
The altitude so measured.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.