| Kenneth G. Wilson (1923). The Columbia Guide to Standard American English. 1993. |
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| billion (n.) |
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| A billion is a thousand millions (1,000,000,000), but the British once used the term to mean what we mean by a trillion. See MILLIARD; TRILLION. | 1 |
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| | | The Columbia Guide to Standard American English. Copyright © 1993 Columbia University Press. |
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