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Webster's New World College Dictionary » septillion
septillion
septillion definition
sep·til·lion (sep til′yən)
noun
- ☆ the number represented by 1 followed by 24 zeros
- Brit. the number represented by 1 followed by 42 zeros
Etymology: Fr < L septem, seven + Fr (m)illion
adjective
amounting to one septillion in number
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