exponential
adjective
ex·po·nen·tial
| \ ˌek-spə-ˈnen(t)-shəl
\
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Definition of exponential
1
: of or relating to an exponent
2
: involving a variable in an exponent
10x 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