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Dictionary

quin•til•lion

Pronunciation: (kwin-til'yun), [key]
—n., pl. -lions, (as after a numeral) -lion,
—adj.

—n.
a cardinal number represented in the U.S. by 1 followed by 18 zeros, and in Great Britain by 1 followed by 30 zeros.

—adj.
amounting to one quintillion in number.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

Quintilian

quintuple

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