Definition of octodecillion

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< October

octodecimo >

oc·to·de·cil·lion

(

-d

-s

n) KEY

NOUN:

The cardinal number equal to 10⁵⁷.
Chiefly British The cardinal number equal to 10¹⁰⁸.

ETYMOLOGY:
Latin octdecim, eighteen ; see octodecimo + (m)illion

OTHER FORMS:
octo·de·cillion(Adjective), octo·de·cillionth(Adjective)(Adverb)(Noun)

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