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undecillion

un·de·cil·lion [ ùndi síllyən ] (plural un·de·cil·lions)


noun 
Definition:
 
1. 1 followed by 36 zeros: the number equal to 1036, written as 1 followed by 36 zeros

2. U.K. 1 followed by 66 zeros: the number equal to 1066, written as 1 followed by 66 zeros

[Mid-20th century. < Latin undecim "eleven" + million]
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