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quin·de·cil·lion | \ ˌkwin-di-ˈsil-yən 
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\Definition of quindecillion
US : a number equal to 1 followed by 48 zeros — see Table of Numbers also, British : a number equal to 1 followed by 90 zeros — see Table of Numbers
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Time Traveler for quindecillion
The first known use of quindecillion was in 1848
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