# equation
## English
### Alternative forms

* æquation (archaic)

### Etymology

From Old French, from Latin aequātiō (“an equalizing”). Morphologically equate +‎ -ion

### Pronunciation

* enPR: ĭkwā'zhən, IPA: /ɪˈkweɪʒən/; enPR: ĭkwā'shən, IPA: /ɪˈkweɪʃən/
* Audio (US):(file)
* Rhymes: -eɪʒən

### Noun

equation (plural equations)
* The act or process of equating two or more things, or the state of those things being equal (that is, identical).
    We need to bring the balance of power into equation
** 2013, Eva Illouz, Why Love Hurts: A Sociological Explanation:The cultural equation of love with suffering is similar to the equation of love with an experience of both transcendence and consummation in which love is affirmed in an ostentatious display of self loss.
* (mathematics) An assertion that two expressions are equal, expressed by writing the two expressions separated by an equal sign; in mathematical problems, equations describe various essential aspects of the problem, each of which contributes to the resolution of the problem in part.
* (astronomy) A small correction to observed values to remove the effects of systematic errors in an observation.

#### Derived terms

* absolute personal equation
* accounting equation
* affected equation
* Airy equation
* algebraic equation
* Arrhenius equation
* balance sheet equation
* Bellman equation
* Bernoulli's equation
* Boltzmann equation
* Cartesian equation
* Cassie equation
* Cauchy-Riemann equation
* Chazy equation
* chemical equation
* cubic equation
* delay differential equation
* difference equation
* differential equation
* Diophantine equation
* Dirac equation
* Drake equation
* Duffing equation
* Ehrenfest equation
* eigenequation
* Einstein field equation
* enter into the equation
* enter the equation
* equation clock
* equation division
* equationlike
* equation of motion
* equation of time
* Ernst equation
* Euler-Lagrange equation
* exponential equation
* Fermat equation
* Flory-Fox equation
* Gauss-Codazzi equation
* generalized estimating equation
* Gibbs-Helmholtz equation
* Gibbs-Thomson equation
* Hagen-Poiseuille equation
* half-equation
* Hall-Petch equation
* Hamilton-Jacobi-Bellman equation
* Hamilton-Jacobi equation
* Hartree equation
* Henderson-Hasselbalch equation
* HJB equation
* integral equation
* Kepler's equation
* Lagrange's equations
* Laguerre's equation
* Lanchester equation
* Laplace's equation
* Legendre's differential equation
* Lewin's equation
* light equation
* Lindley equation
* linear equation
* Lotka-Volterra equation
* Manning's equation
* MOJS equation
* Morison equation
* Navier-Stokes equation
* Nernst equation
* net ionic equation
* nonequation
* ordinary differential equation
* parametric equation
* partial differential equation
* Pell equation
* Pell-Fermat equation
* Pell's equation
* Penman equation
* personal equation
* polar equation
* polynomial equation
* power equation
* Price equation
* Price's equation
* quadratic equation
* rate equation
* Riccati equation
* rocket equation
* Schrodinger equation
* Schrödinger equation
* Schrödinger's equation
* Schrodinger's equation
* Schrödinger's wave equation
* Schroedinger equation
* Schroedinger's equation
* sine-Gordon equation
* Slutsky equation
* Steinmetz's equation
* stochastic differential equation
* Sturm-Liouville equation
* subequation
* Sylvester equation
* time-average equation
* time-independent Schrödinger equation
* Van der Waals equation
* van der Waals equation
* van der Waals equation of state
* Volterra integral equation
* wave equation
* Weingarten equation
* Wheeler-DeWitt equation
* Yang-Baxter equation
* Young-Laplace equation

#### Related terms

* equality
* equational
* identity
* inequation
* inequality