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Webster's New World College Dictionary » billionth
billionth
billionth definition
bil·lionth (bil′yənt̸h)
adjective
- coming last in a series of a billion
- designating any of the billion equal parts of something
noun
- the last in a series of a billion
- any of the billion equal parts of something
Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
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