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duodecillion

du·o·de·cil·lion [ d ō di síllyən ] (plural du·o·de·cil·lions)


noun 
Definition:
 
1. 1 followed by 39 zeros: the number equal to 1039, written as 1 followed by 39 zeros

2. U.K. 1 followed by 72 zeros: the number equal to 1072, written as 1 followed by 72 zeros

[Late 19th century. < Latin duodecim "twelve" + million]
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