equation


equation
/i kway"zheuhn, -sheuhn/, n.
1. the act of equating or making equal; equalization: the symbolic equation of darkness with death.
2. equally balanced state; equilibrium.
3. Math. an expression or a proposition, often algebraic, asserting the equality of two quantities.
4. Chem. a symbolic representation showing the kind and amount of the starting materials and products of a reaction.
[1350-1400; ME < L aequation- (s. of aequatio) an equalizing. See EQUATE, -ION]

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I
Statement of equality between two expressions consisting of variables and/or numbers.

In essence, equations are questions, and the development of mathematics has been driven by attempts to find answers to those questions in a systematic way. Equations vary in complexity from simple algebraic equations (involving only addition or multiplication) to differential equations, exponential equations (involving exponential expressions), and integral equations. They are used to express many of the laws of physics. See also system of equations.
II
(as used in expressions)
Green Bank equation
Laplace's equation
motion equation of
state equation of
Maxwell's equations

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Universalium. 2010.

Look at other dictionaries:

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  • équation — [ ekwasjɔ̃ ] n. f. • 1613; h. XIIIe « égalité »; lat. æquatio 1 ♦ (1637) Math. Relation conditionnelle existant entre deux quantités et dépendant de certaines variables (ou inconnues). Poser une équation. Mettre en équation un phénomène complexe …   Encyclopédie Universelle

  • Equation — E*qua tion, n. [L. aequatio an equalizing: cf. F. [ e]quation equation. See {Equate}.] 1. A making equal; equal division; equality; equilibrium. [1913 Webster] Again the golden day resumed its right, And ruled in just equation with the night.… …   The Collaborative International Dictionary of English

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  • equation — late 14c., a term in astrology; meaning “action of making equal” is from 1650s; mathematical sense is from 1560s, on notion of equalizing the expressions; from L. aequationem (nom. aequatio) an equal distribution, community, from pp. stem of… …   Etymology dictionary

  • equation — ► NOUN 1) the process of equating one thing with another. 2) Mathematics a statement that the values of two mathematical expressions are equal (indicated by the sign =). 3) Chemistry a symbolic representation of the changes which occur in a… …   English terms dictionary

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  • Equation — This article is about equations in mathematics. For the chemistry term, see chemical equation. The first use of an equals sign, equivalent to 14x+15=71 in modern notation. From The Whetstone of Witte by Robert Recorde (1557). An equation is a… …   Wikipedia


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