Definition:Quadrillion/Long Scale/Historical Note
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Historical Note on Quadrillion (Long Scale)
The British usage of quadrillion to mean $10^{24}$, that is $1 \, 000 \, 000^4$, is no longer used.
Sources
- 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): quadrillion