a suffix used to create large numbers. The number n-plex is 10n, which is 1 followed by n zeros. Thus a googol is 100-plex, for example. The American mathematician Edward Kasner, who invented the googol in 1938, also defined a "googolplex" to be 1 followed by a googol of zeros, thus suggesting this generalization. See also dex and -minex.

Dictionary of units of measurement. 2015.

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