American Heritage Dictionary
(2)
Century Dictionary
(2)
GNU Webster's 1913
(1)
WordNet
(2)
Elsewhere on the web
The computer performs one quadrillion (one million billion) computations per second.— California Literary Review
"I think it's quadrillion or sextillion or something."— WORLD Magazine | Community
A quadrillion isn't just a number they made up, it means a 1000 trillion.— Ace of Spades HQ
Worse, about 95\% of that $1.14 quadrillion is on margin.— Ace of Spades HQ

American Heritage Dictionary (1)
Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word a few times a year.
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