Together, a prime meridian and its antimeridian (the 180th meridian in a 360°-system) form a great circle. The prime meridian is a geographical reference line that passes through the Royal Observatory, Greenwich, in London, England. The prime meridian is also used as the basis for the world’s time zones. The Most Surprisingly Serendipitous Words Of The Day. The prime meridian is the starting point for the calculation of geographic longitude and is the central meridian of the zero time zone. How to Use Equator vs prime meridian Correctly – Grammarist Grammarist is a professional online English grammar dictionary, that provides a variety of grammatical tools, rules and tips in order to improve your grammar and to help you distinguish between commonly … A prime meridian is the place where to start measuring east-west distance. It was first established by Sir George Airy in 1851, and by 1884, over two-thirds of all ships and tonnage used it as the reference meridian on their charts and maps. Unlike the Equator’s position that is determined by the Earth’s rotational axis, the position of the Prime Meridian has been defined arbitrarily over the years as Greenwich in the United Kingdom. Local mean solar time at the prime meridian is widely used in astronomy (so-called universal time). All rights reserved. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. a line of longitude, at which longitude is defined to be 0°.A prime meridian and its opposite in a 360°-system, the 180th meridian (at 180° longitude), form a great circle.. ‘The prime meridian is the line which runs through Greenwich Observatory and is used globally as a standard ‘zero’ point.’ ‘And it's where time itself starts, being the site of the prime meridian, Greenwich Mean Time or degrees longitude, depending on what you prefer.’ మొదటి రేఖ 2. A meridian used as a reference line from which longitude east and west is measured. The mean solar time at Greenwich is now called Universal Time (q.v.) prime meridian in American English the meridian from which longitude is measured both east and west ; 0° longitude: it passes through Greenwich, England Webster’s New World College Dictionary, 4th Edition. This great circle divides the sphere, e.g., the … The words are ante-meridiem (am) and post-meridiem (pm). It was first established by Sir George Airy in 1851, and by 1884, over two-thirds of all ships and tonnage used it as the reference meridian on their charts and maps. © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins and was formerly called Greenwich Mean Time (q.v.). Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London, reckoned from midnight.At different times in the past, it has been calculated in different ways, including being calculated from noon; as a consequence, it cannot be used to specify a precise time unless a context is given. “Prime meridian.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/prime%20meridian. Prime definition is - the second of the canonical hours. ప్రథమ రేఖాంశము Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. العربية. Together, a prime meridian and its anti-meridian (the 180th meridian in a 360°-system) form a great circle.This great circle divides a spheroid into two hemispheres.If one uses directions of East and West from a defined prime meridian, then they can be called the Eastern … The true prime meridian of the world, as agreed by every nation on the planet in 1984, is the IERS Reference Meridian, which is also known as the International Reference Meridian or IRM. • PRIME MERIDIAN (noun) The noun PRIME MERIDIAN has 1 sense:. Meridian definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. : an imaginary line that runs from the North Pole to the South Pole through Greenwich, England. Theoretically, standard time becomes … Meaning of PRIME MERIDIAN. What does PRIME MERIDIAN mean? A prime meridian is the meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. [ prīm ] The meridian with a longitude of 0°, adopted officially in 1884 as a reference line from which longitude east and west are measured and as a basis for standardized time zones. Prime Meridian The meridian passing through Greenwich, England, designated as the zero meridian (0°) by an international conference in 1884. synonym.com. English speakers often use GMT as a synonym for Coordinated Universal Time (UTC). The Prime Meridian is an imaginary line that, similar to the equator, divides the earth into eastern and western hemispheres. People living in different parts of the world cannot have the same time. Dictionary entry overview: What does prime meridian mean? A protagonist is the main character of a story, or the lead. "prime" മലയാള വ്യാഖ്യാനം, അര്‍ഥം. Learn more. English. Copyright © 2011. It is about 40,075 km (24,901 mi) long, of which 78.8% lies across water and 21.3% over land. Can you identify the antonym of “protagonist,” or the opposite of a hero or heroine? As the prime meridian, the north-south line at Greenwich is used as the reference for all other meridians of longitude, which are numbered east or west of it. We know that we measure longitude from this particular meridian, the prime meridian. : the meridian of 0 degrees longitude which runs through the original site of the Royal Observatory at Greenwich, England, and from which other longitudes are reckoned. “Pagan” vs. “Wicca”: What Is The Difference? Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012. Information and translations of PRIME MERIDIAN in the most comprehensive dictionary definitions resource on the web. Français. The prime meridian is the line of 0 longitude, the starting point for measuring distance both east and west around the Earth. Learn more. We know that the Earth is round and that it takes 24 hours to complete one rotation around the sun. Widely used in astronomy ( so-called Universal time ) into two equal:... 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