WordWeight : Weighing the Words

Pronunciation : Ex`po*nen"tial
Part of Speech : a.
Etymology : [Cf. F. exponentiel.]
Definition : Defn: 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.
Source : Webster's Unabridged Dictionary, 1913