Recent Examples of quadrillion from the Web
So the internet has at least 10^19 transistors, compared to the roughly 1000 trillion (or quadrillion) synapses in the human brain.
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Origin and Etymology of quadrillion
French, from Middle French, from quadri- + -illion (as in million)
First Known Use: circa 1690
QUADRILLION Defined for English Language Learners
Definition of quadrillion for English Language Learners
: the number 1,000,000,000,000,000 : one thousand trillion
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