from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A meridian used as a reference line from which longitude east and west is measured.
- noun The meridian passing through Greenwich, England, designated as the zero meridian (0°) by an international conference in 1884.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun The
reference lineat 0° longitude, passing through Greenwich, England, from which longitude eastand westis measured.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun meridian at zero degree longitude from which east and west are reckoned (usually the Greenwich longitude in England)
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