Definition of exponential
1
: of or relating to an exponent
2
: involving a variable in an exponent
10^{x} is an exponential expression
3
: expressible or approximately expressible by an exponential function
especially
: characterized by or being an extremely rapid increase (as in size or extent)
an exponential growth rate
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MerriamWebster unabridged
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Time Traveler for exponential
The first known use of exponential was in 1704
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