tredecillion

tredecillion [tree-di-sil-yuh n] Word Origin noun, plural tre·de·cil·lions, (as after a numeral) tre·de·cil·lion.

1. a cardinal number represented in the U.S. by 1 followed by 42 zeros, and in Great Britain by 1 followed by 78 zeros.

adjective

2. amounting to one tredecillion in number.

Origin of tredecillion 1930–35; Latin trē(s) three + decillion Related formstre·de·cil·lionth, adjective, noun