prime meridian


Also found in: Thesaurus, Acronyms, Encyclopedia, Wikipedia.
click for a larger image
Prime Meridian

prime meridian

n.
1. A meridian used as a reference line from which longitude east and west is measured.
2. Prime Meridian The meridian passing through Greenwich, England, designated as the zero meridian (0°) by an international conference in 1884.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

prime meridian

n
(Physical Geography) the 0° meridian from which the other meridians or lines of longitude are calculated, usually taken to pass through Greenwich
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

prime′ merid′ian


n.
the meridian running through Greenwich, England, from which longitude east and west is reckoned.
[1860–65]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

prime meridian

(prīm)
The meridian with a longitude of 0°, used as a reference line from which longitude east and west is measured. It passes through Greenwich, England.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

prime meridian

An imaginary north-south line of longitude that passes through Greenwich, England, and is used as the basis for longitudinal measurements on the globe.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.prime meridian - meridian at zero degree longitude from which east and west are reckoned (usually the Greenwich longitude in England)
line of longitude, meridian - an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator; "all points on the same meridian have the same longitude"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Pamela Gay teaches physics and astronomy at Southern Illinois University at exactly 90[degrees] west longitude--one-quarter of the way around the world from the prime meridian.
Sitting on the world's prime meridian - zero degrees longitude - it is tilted at 51.5 degrees, the latitude of London.
It was agreed that the governments represented would adopt the Prime Meridian at Greenwich.
Its subsidiaries are: First Gas Holdings Corp., Unified Holdings Corp., First Gen Renewables Inc., Prime Meridian Powergen Corp., First Gas Power Corp.
In the case of the widely used WGS84, the meridian line for longitude 0[degrees] is offset about 100 meters east of the world's prime meridian traditionally marked by the Airy transit telescope at the old Royal Observatory in Greenwich, England (see page 99).
The conference chose Greenwich, England, as the prime meridian; that is, the meridian designated as 0[degrees] longitude.
Now, the 1[degrees] shift closer to the Prime Meridian and the accompanying 4-minute adjustment to Universal Time is barely noticeable.
Blow up the home of the Prime Meridian and you attack the passage of time itself." This discussion about time, in the midst of gentle waves, gave me the impetus to begin a journey down a path to one of the strangest astronomical stories in history.
To establish east-west coordinates on a sphere, however, we must choose an arbitrary "prime meridian" from which to begin measuring.

Full browser ?