astronomical meridian

astronomical meridian

[‚as·trə′näm·ə·kəl mə′rid·ē·ən]
(geodesy)
A line on the surface of the earth connecting points having the same astronomical longitude. Also known as terrestrial meridian.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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