googolplex

[goo-gawl-pleks, -gol-, -guh l-] /ˈgu gɔlˌplɛks, -gɒl-, -gəl-/
noun
1.
a number that is equal to 1 followed by a googol of zeros and expressed as .
Origin of googolplex
1935-40; googol + -plex
British Dictionary definitions for googolplex

googolplex

/ˈɡuːɡɒlˌplɛks; əl-/
noun
1.
the number represented as one followed by a googol (10100) of zeros
Word Origin
C20: from googol + (du)plex
googolplex in Science
googolplex
  (g'gôl-plěks')   
The number 10 raised to the power googol, written out as the numeral 1 followed by a googol (10100) of zeros.
googolplex in Technology

mathematics
The number represented in base-ten by a one with a googol zeroes after it.
(2001-03-29)