equation

[ih-kwey-zhuh n, -shuh n]
See more synonyms for equation on Thesaurus.com
noun
  1. the act of equating or making equal; equalization: the symbolic equation of darkness with death.
  2. equally balanced state; equilibrium.
  3. Mathematics. an expression or a proposition, often algebraic, asserting the equality of two quantities.
  4. Also called chemical equation. Chemistry. a symbolic representation showing the kind and amount of the starting materials and products of a reaction.

Origin of equation

1350–1400; Middle English < Latin aequātiōn- (stem of aequātiō) an equalizing. See equate, -ion
Related formsnon·e·qua·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for equation

comparison, equalization

Examples from the Web for equation

Contemporary Examples of equation

Historical Examples of equation

  • Every time Peter came into the equation her heart arose in his defense.

    Her Father's Daughter

    Gene Stratton-Porter

  • But for the other end of the equation I could speak authoritatively.

    Her Father's Daughter

    Gene Stratton-Porter

  • An equation expressing these facts will then have much value.

  • The extension of the government reserves changed the equation.

    Brand Blotters

    William MacLeod Raine

  • The equation seemed undisturbed, yet there was something wrong with it.

    Eight Keys to Eden

    Mark Irvin Clifton


British Dictionary definitions for equation

equation

noun
  1. a mathematical statement that two expressions are equal: it is either an identity in which the variables can assume any value, or a conditional equation in which the variables have only certain values (roots)
  2. the act of regarding as equal; equating
  3. the act of making equal or balanced; equalization
  4. a situation, esp one regarded as having a number of conflicting elementswhat you want doesn't come into the equation
  5. the state of being equal, equivalent, or equally balanced
  6. a situation or problem in which a number of factors need to be considered
  7. See chemical equation
  8. astronomy See personal equation
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
n.

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

equation in Medicine

equation

[ĭ-kwāzhən]
n.
  1. 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.
  2. 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.

equation in Science

equation

[ĭ-kwāzhən]
  1. 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.
  2. 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.

equation in Culture

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.