# equation

[ ih-kwey-zhuh n, -shuh n ]

/ ɪˈkweɪ ʒən, -ʃən /

### noun

the act of equating or making equal; equalization: the symbolic equation of darkness with death.

equally balanced state; equilibrium.

Mathematics. an expression or a proposition, often algebraic, asserting the equality of two quantities.

Also called chemical equation. Chemistry. a symbolic representation showing the kind and amount of the starting materials and products of a reaction.

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## Nearby words

## Origin of equation

Related formsnon·e·qua·tion, noun

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

## Examples from the Web for equation

## British Dictionary definitions for equation

## equation

/ (ɪˈkweɪʒən, -ʃən) /

### noun

Derived Formsequational, adjectiveequationally, adverb

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Word Origin and History for equation

## 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 Latin aequationem (nominative aequatio) "an equal distribution, community," from past participle stem of aequare (see equal (adj.)). Chemistry sense is from 1807.

Online Etymology Dictionary, © 2010 Douglas Harper

## Medicine definitions for equation

## equation

[ ĭ-kwā′zhən ]

### n.

A statement asserting the equality of two mathematical expressions, usually written as a linear array of symbols that are separated into left and right sides and are joined by an equal sign.

A representation of a chemical reaction, usually written as a linear array in which the symbols and quantities of the reactants are separated from those of the products by an equal sign, arrow, or set of opposing arrows.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

## Science definitions for equation

## equation

[ ĭ-kwā′zhən ]

Mathematics A written statement indicating the equality of two expressions. It consists of a sequence of symbols that is split into left and right sides joined by an equal sign. For example, 2 + 3 + 5 = 10 is an equation.

Chemistry A written representation of a chemical reaction, in which the symbols and amounts of the reactants are separated from those of the products by an equal sign, arrow, or a set of opposing arrows. For example, Ca(OH)2 + H2SO4 = CaSO4 + 2H2O, is an equation.

The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

## Culture definitions for equation

## equation

An expression of equality between two formulas in mathematics. The two formulas are written with an equal sign between them: 2 + 2 = 4 is an equation, as is E = mc2.

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.