GMT meaning in Academic & Science ?

Answer:

What is Greenwich Mean Time mean?

Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London, counted 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 particular time unless a context is given. The term 'GMT' is also used as one of the names for the time zone UTC+00:00.

English speakers often use GMT as a synonym for Coordinated Universal Time (UTC): in modern usage, this is incorrect – GMT is now a time zone, not a time reference. For navigation, it is considered equivalent to UT1 (the modern form of mean solar time at 0° longitude); but this meaning can differ from UTC by up to 0.9 s. The term GMT should not thus be used for purposes that require precision.

Because of Earth's uneven angular velocity in its elliptical orbit and its axial tilt, noon (12:00:00) GMT is rarely the exact moment the Sun crosses the Greenwich Meridian and reaches its highest point in the sky there. This event may occur up to 16 minutes before or after noon GMT, a discrepancy described by the equation of time. Noon GMT is the annual average (i.e. "mean") moment of this event, which accounts for the word "mean" in "Greenwich Mean Time".

Originally, astronomers considered a GMT day to start at noon, while for almost everyone else it started at midnight. To avoid confusion, the name Universal Time was introduced to denote GMT as counted from midnight. Today, Universal Time usually refers to UTC or UT1.

The term "GMT" is especially used by bodies connected with the United Kingdom, such as the BBC World Service, the Royal Navy, and the Met Office; and others particularly in Arab countries, such as the Middle East Broadcasting Centre and OSN. It is a term commonly used in the United Kingdom and countries of the Commonwealth, including Australia, New Zealand, South Africa, India, Pakistan, Bangladesh and Malaysia; and in many other countries of the Eastern Hemisphere.

reference

Full Form	Category
Greenwich Mean Time (now obsolete)	Academic & Science
Greenwich Mean Time	Academic & Science
Giant Magellan Telescope	Academic & Science
Granite Mountain (ak)	Airport Code
General Motors Truck	Business
Gonzalez Model Talent	Business
Groves Manufacturing & Tooling	Business
Global Marine Travel	Community
Gospel Music Television	Community
Generative Modeling Technologies	Computing
Gigabyte Management Tools	Computing
GMT Token	Cryptocurrency
Generic Mapping Tools	General
Greenwich Moaning Time	General
Great Magazine of Timepieces	General
Greenwhich Mean Time	General
Ground Maintenance Technics	General
Goodman Martinez Thompson	General
Global Membership Team	General
Green Mountain Transit	General
Goodbye Mankind Time	General
Gummi Metall Technik	General
Gambia Maybe Time	General
Greenwich Meridian Time	General
General Motors Trucks	General
Glass Mat Thermoplastic	General
Green Mobility Trophy	General
Guilde Mondiale des Tractionnistes	General
Glass Mat Thermoplastics	General
Ghana Maybe Time	General
Grounds Maintenance Tractor	General
Greek Maybe Time	General
Galaxy Mean Time	General
Guided Missile Transporter	Governmental
Get Me Tight	Internet
General Multi-tasker	Jobs
Good Mother Tincture	Medical
Gums, Mouth, Tonsils	Medical
Grinding My Teeth	Messaging
General Motor Transport	Military and Defence
Ground Moving Target	Military and Defence
Generic Mapping Tool	Softwares
Greenwich Mean Time (replaced By Ut In 1928, Then Utc In 1960)	Space Science
Get Moving Today	Sports
Guyot Motorcycle Team	Sports
Greenwich Mean Time or Greenwich Meridian Time	Time
Greenwich Mean Time (replaced By Universal Time In 1928, and Utc In 1960)	Time