Learn how to say Exponential correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word exponential:
(mathematics) (of a function, curve, series, or equation) of, containing, or involving one or more numbers or quantities raised to an exponent, esp ex
(mathematics) raised to the power of e, the base of natural logarithms exp
of or involving an exponent or exponents
(informal) very rapid
(mathematics) an exponential function, etc