Ex`po*nen"tial (?), a. [Cf. F. exponentiel.]
Pertaining to exponents; involving variable exponents; as, an exponential expression; exponential calculus; an exponential function.
Exponential curve, a curve whose nature is defined by means of an exponential equation. -- Exponential equation, an equation which contains an exponential quantity, or in which the unknown quantity enters as an exponent. -- Exponential quantity Math., a quantity whose exponent is unknown or variable, as ax. -- Exponential series, a series derived from the development of exponential equations or quantities.
© Webster 1913.