Y meaning in Measurement Unit ?

Answer:

What is Years mean?

A year is the orbital period of a planetary body, for example, the Earth, moving in its orbit around the Sun. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by change in weather, the hours of daylight, and, consequently, vegetation and soil fertility. In temperate and subpolar regions around the planet, four seasons are generally recognized: spring, summer, autumn and winter. In tropical and subtropical regions, several geographical sectors do not present defined seasons; but in the seasonal tropics, the annual wet and dry seasons are recognized and tracked.

A calendar year is an approximation of the number of days of the Earth's orbital period, as counted in a given calendar. The Gregorian calendar, or modern calendar, presents its calendar year to be either a common year of 365 days or a leap year of 366 days, as do the Julian calendars (see below). For the Gregorian calendar, the average length of the calendar year (the mean year) across the complete leap cycle of 400 years is 365.2425 days. In English, the abbreviations "y" and "yr" are commonly used ("a" is also used) for the unit of time, though its exact duration may be inconsistent.

In astronomy, the Julian year is a unit of time; it is defined as 365.25 days of exactly 86,400 seconds (SI base unit), totalling exactly 31,557,600 seconds in the Julian astronomical year.

The word year is also used for periods loosely associated with, but not identical to, the calendar or astronomical year, such as the seasonal year, the fiscal year, the academic year, etc. Similarly, year can mean the orbital period of any planet; for example, a Martian year and a Venusian year are examples of the time a planet takes to transit one complete orbit. The term can also be used in reference to any long period or cycle, such as the Great Year.

reference

Full Form	Category
Young's Modulus of elasticity	Academic & Science
Alleghany Corporation of Delaware	Business
Yttrium	Chemistry
Youth	Community
Ymca	Community
Yelling	Community
Youthful	Community
Contrast (gamma)	Community
Vertical Axis (plotter Y-axis)	Computer Hardware
Admittance	Computing
Luminance Component	Computing
Luminosity	Computing
Yocto	Computing
Yacc Grammar File	File Type
Yield	General
Yards	General
YELIYUR	Indian Railway Station
Y-axis (vertical Axis)	Maths
Years	Measurement Unit
Year or years	Medical
Why??	Messaging
Search and Rescue Unit Error	Military and Defence
Out-of-plane Position - Vertical	Physics Related
Vertical Axis	Physics Related
Width of Vehicle Or Structure - Horizontal Axis	Space Science
Yaw	Space Science
Y-axis	Space Science
Yukon Standard Time [utc - 0900]	Time