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What does BYA stand for? 

What does BYA mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: BYA.

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BYA

Boundary, Alaska USA

Regional » Airport Codes

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BYA

Beat Your A**

Internet » Chat

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BYA

Before You All

Miscellaneous » Funnies

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BYA

Barr Young Attorneys

Governmental » Law & Legal

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BYA

Brigham Young Academy

Academic & Science

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BYA

Bishop Young Academy

Academic & Science

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BYA

Billion Years Ago

Miscellaneous » Unclassified

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BYA

Boost Your Average

Miscellaneous » Unclassified

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BYA

Billion of Years Ago

Miscellaneous » Unclassified

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BYA

Because You Asked

Miscellaneous » Unclassified

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BYA

Beat Your Ass

Miscellaneous » Unclassified

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BYA

Billions Of Years Ago

Miscellaneous » Unit Measures

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BYA

Berkeley Youth Alternatives

Community » Youth

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BYA

Baltimore Youth Arts

Community » Youth

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BYA

Biola Youth Academics

Community » Youth

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BYA

Birmingham Youth Assistance

Community » Youth

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BYA

Bayview Youth Advocates

Community » Youth

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BYA

Bloomfield Youth Assistance

Community » Youth

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BYA

Board Youth Advisor

Community » Youth

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BYA

Barrington Youth Association

Community » Youth

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BYA

Burleson Youth Association

Community » Youth

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BYA

Brownsville Youth Association

Community » Youth -- and more...

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BYA

Bartow Youth Academy

Community » Youth -- and more...

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BYA

Barter Youth Academy

Community » Youth -- and more...

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What does BYA mean?

Bya
bya or b.y.a. is an abbreviation for "billion years ago". It is commonly used as a unit of time to denote length of time before the present in 109 years. This initialism is often used in the sciences of astronomy, geology, and paleontology. The "billion" in bya is the 109 "billion" of the short scale of the U.S., not the long-scale 1012 "billion" of some European usage. Billion by this convention (109) is often called a "thousand million" in the UK and a "milliard" in some other countries. For this reason, there is potential for some confusion, and some scientists prefer the unit Gya, while others prefer Ga (Giga-annum), however bya remains in more widespread use. In 1974, the UK switched from the long scale to the short scale.Related units are mya ("million years ago"), and byr ("billion years"). These are traditionally written in lowercase. Ga or Gya has a capitalized first letter instead.

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