Webster's Revised Unabridged Dictionary · 1913

Exponent

Exponent , noun

[Latin exponens, -entis, present participle of exponere to put out, set forth, expose. See Expound.]

thus a2 denotes the second power, and ax the xth power, of a (2 and x being the exponents). A fractional exponent, or index, is used to denote the root of a quantity. Thus, a⅓ denotes the third or cube root of a.

1.
(Algebra) A number, letter, or any quantity written on the right hand of and above another quantity, and denoting how many times the latter is repeated as a factor to produce the power indicated
2.
One who, or that which, stands as an index or representative; as, the leader of a party is the exponent of its principles.
3.
one who explains, expounds, or interprets.
Collocations (1)
Exponent of a ratio , the quotient arising when the antecedent is divided by the consequent; thus, 6 is the exponent of the ratio of 30 to 5. [Rare]