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From The Collaborative International Dictionary of English v.0.44 [gcide]:
Exponent \Ex*po"nent\, noun [L. exponens, -entis, p. pr. of exponere to put out, set forth, expose. See {Expound}.]
1. (Alg.) 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;
Note: thus a^{2} denotes the second power, and a^{x} 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, a^{1/3} denotes the third or cube root of a.
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. [PJC]
{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. [R.]
From WordNet (r) 2.0 [wn]:
exponent
noun
1: a person who pleads for a cause or propounds an idea [syn: {advocate}, {advocator}, {proponent}]
2: someone who expounds and interprets or explains
3: a mathematical notation indicating the number of times a quantity is multiplied by itself [syn: {power}, {index}]
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
128 Moby Thesaurus words for "exponent": Maecenas, abettor, admirer, advocate, aficionado, allegorist, alter ego, alternate, amicus curiae, angel, annotator, apologist, attorney, backer, backup, backup man, booster, buff, case, case in point, champion, cicerone, clarifier, commentator, critic, cross section, cryptanalyst, cryptographer, cryptologist, decoder, defender, definer, demonstration, demonstrator, demythologizer, dependence, deputy, diaskeuast, dragoman, dummy, editor, emblem, embodiment, emendator, emender, encourager, endorser, euhemerist, example, executive officer, exegesist, exegete, exegetist, exemplar, exemplification, explainer, explanation, explicator, expositor, expounder, fan, favorer, figurehead, friend at court, go-between, guide, hermeneut, illustration, instance, interpreter, lexicographer, lieutenant, locum, locum tenens, lover, mainstay, maintainer, metaphrast, object lesson, oneirocritic, paranymph, paraphrast, partisan, patron, pinch hitter, pleader, procurator, promoter, proponent, protagonist, proxy, relevant instance, reliance, representation, representative, scholiast, second, second in command, secondary, seconder, sectary, sider, specimen, sponsor, stalwart, stand-in, standby, substitute, support, supporter, surrogate, sustainer, symbol, sympathizer, textual critic, translator, type, typical example, typification, understudy, upholder, utility man, vicar, vicar general, vice, vicegerent, votary, well-wisher
From The Free On-line Dictionary of Computing (27 SEP 03) [foldoc]:
exponent (Or "characteristic") The part of a {floating-point} number specifying the power of ten by which the {mantissa} should be multiplied. In the common notation, e.g. 3.1E8, the exponent is 8. (1995-02-27)
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