duodecillion

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du·o·de·cil·lion

D0427550 (do͞o′ō-dĭ-sĭl′yən, dyo͞o′-)n.1. The cardinal number equal to 1039.2. Chiefly British The cardinal number equal to 1072.
[Latin duodecim, twelve; see duodecimal + (m)illion.]
du′o·de·cil′lion adj.du′o·de·cil′lionth adj.adv. & n.

duodecillion

(ˌdjuːəʊdɪˈsɪljən) n (Units) a name for a number also known as sextilliard and equivalent to 10 to the power 39 in the short scale numerical system

du•o•de•cil•lion

(ˌdu oʊ dɪˈsɪl yən, ˌdyu-)

n., pl. -lions, (as after a numeral) -lion, n. 1. a cardinal number represented in the U.S. by 1 followed by 39 zeros, and in Great Britain by 1 followed by 72 zeros. adj. 2. amounting to one duodecillion in number. [1910–15; < Latin duodecim twelve] du`o•de•cil′lionth, n., adj.