quintillionth

1 of 2

adjective

quin·​til·​lionth

1

: being number one quintillion in a countable series see Table of Numbers

2

: being one of a quintillion equal parts into which anything is divided

quintillionth

2 of 2

noun

"

plural quintillionths

-yən(t)s, 

-n(t)ths

: one of a quintillion equal parts of anything

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