noun, often attributive \ˌtrē-di-ˈsil-yən\

Definition of TREDECILLION

US :  a number equal to 1 followed by 42 zeros — see number table; also British :  a number equal to 1 followed by 78 zeros — see number table


Latin tredecim thirteen (from tres three + decem ten) + English -illion (as in million) — more at three, ten
First Known Use: 1850


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