What does BYR mean in Educational?

This page is about the meanings of the acronym/abbreviation/shorthand BYR in the Community field in general and in the Educational terminology in particular.

Books for Young Readers

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Definition

What does BYR mean?

byr
The abbreviation Byr means "billion years". A closely related abbreviation is bya "billion years ago". Byr was formerly used in English-language geology and astronomy as a unit of one billion years. Today, the term gigaannum is also used, but Gy or Gyr are still sometimes used in English-language works. Astronomers use Gyr or Gy as an abbreviation for gigayear. Specifically, one Gyr is equal to 10⁹ years. Because a billion means 1000 million in some countries but can mean a million million in others its use is deprecated in favour of giga- which unambiguously means 10⁹ and annum which for precision may be qualified by, etc.

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"BYR." Abbreviations.com. STANDS4 LLC, 2021. Web. 2 Aug. 2021. <https://www.abbreviations.com/term/128670>.

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    • A. Prisoner Of World
    • B. Persons Of Wars
    • C. Private Of War
    • D. Prisoner Of War

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