prime meridian


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prime meridian,

meridian that is designated zero degree (0°) longitude, from which all other longitudes are measured. By international convention, it passes through the site of the Royal Observatory in Greenwich, England; for this reason, it is sometimes called the Greenwich meridian. Universal timeuniversal time
(UT), the international time standard common to every place in the world, it nominally reflects the mean solar time along the earth's prime meridian (renumbered to equate to civil time).
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, the standard basis for determining time throughout the world, is civil timecivil time,
local time based on universal time. Civil time may be formally defined as mean solar time plus 12 hr; the civil day begins at midnight, while the mean solar day begins at noon.
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 measured at the prime meridian.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/

prime meridian

The arbitrary circle of zero longitude on the Earth or some other planet or mapped celestial body. The Earth's prime meridian is the Greenwich meridian.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Prime Meridian

 

(or zero meridian), the terrestrial meridian that passes through Greenwich, the site of the old Royal Observatory. The prime meridian is the starting point for the calculation of geographic longitude and is the central meridian of the zero time zone. Local mean solar time at the prime meridian is widely used in astronomy (so-called universal time).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

prime meridian

[′prīm mə‚rid·ē·ən]
(geodesy)
The meridian of longitude 0°, used as the origin for measurement of longitude; the meridian of Greenwich, England, is almost universally used for this purpose.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

prime meridian

The meridian passing through Greenwich (UK). It is longitude 0°. See longitude.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved

prime meridian

the 0° meridian from which the other meridians or lines of longitude are calculated, usually taken to pass through Greenwich
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Aguirre thinks it would be cool to sail to the spot in the Atlantic Ocean off the coast of Africa where the prime meridian and the equator--and the Northern, Southern, Western, and Eastern Hemispheres--meet at longitude 0[degrees] 00' 00", latitude 0[degrees] 00' 00".
Prime Meridian has opened a new branch at Tallahassee.
More than 40,000 people have already joined the network, according to Brannick Riggs, MD, Prime Meridian's medical director.
In the plate showing West Africa, it is clear that Rotz used Ferro as his prime meridian for the portolans in the atlas.
The Greenwich Observatory in London was not accepted as the prime meridian for all countries until the late 19th century, and Withers describes the situation before then--when every country designated its own starting point for navigation and cartography--and afterwards as everyone gradually began using the same zero.
As Charles Withers' compelling book explains, however, the battle to establish a uniform prime meridian was hard fought.
The prime meridian, though not a "real thing," rules the life of everyone on the planet; it's the place at which the world's longitude is set at zero degrees, giving humans the ability to standardize the measures of both longitude and time.
28 November 2016 - UK-based food manufacturing company Anglo African Agriculture plc's (LSE: AAAP) Dynamic Intertrade Ltd subsidiary and its Italian company joint venture partner, have signed an agreement with Canada-based Prime Meridian Resources Corp.
In a disclosure to the Philippine Stock Exchange Thursday, First Gen said that its unit, Prime Meridian Powergen Corp., received the certificate of compliance (COC) issued by the Energy Regulatory Commission for the Avion Plant, which is located within the parent firm's clean energy complex in Batangas.
By using nonstandard credit metrics and pursuing sometimes neglected corners of the loan market - particularly younger borrowers with little credit history - online lenders have been able to penetrate the $3.3 trillion consumer lending space, originating some $18 billion in loans last year, according to a (http://www.pmifunds.com/marketplace-lending-in-2015-a-year-of-performance-and-growth/) report by Prime Meridian Capital Management.
Yes, the world confirmed in 1884 at an international conference in Washington that an imaginary line running through Greenwich, England, would be the prime meridian dividing the Eastern and Western hemispheres of the world, the longitude by which all other places in the world would be measured.

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