from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The zero meridian (0°), used as a reference line from which longitude east and west is measured. It passes through Greenwich, England.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The reference line at 0° longitude, passing through Greenwich, England, from which longitude east and west is measured.
from the GNU version of the Collaborative International Dictionary of English
- adj. the meridian from which longitude is reckoned, as the meridian of Greenwich or Washington.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. meridian at zero degree longitude from which east and west are reckoned (usually the Greenwich longitude in England)
Sorry, no etymologies found.