chemical equation

e·qua·tion

[ih-kwey-zhuhn, -shuhn]
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:
1350–1400; Middle English < Latin aequātiōn- (stem of aequātiō) an equalizing. See equate, -ion

non·e·qua·tion, noun
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World English Dictionary
chemical equation
 
n
a representation of a chemical reaction using symbols of the elements to indicate the amount of substance, usually in moles, of each reactant and product

equation (ɪˈkweɪʒən, -ʃən) [Click for IPA pronunciation guide]
 
n
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 elements: what 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
 
e'quational
 
adj
 
e'quationally
 
adv

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Dictionary.com's 21st Century Lexicon
Main Entry:  chemical equation
Part of Speech:  n
Definition:  a symbolic representation of a chemical reaction, specif. the reactants on the left and the products on the right, separated by an equal sign or directional arrows
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Etymonline
Word Origin & History

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, from aequare (see equal). Chemistry sense is from 1807.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

equation e·qua·tion (ĭ-kwā'zhən, -shən)
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, an arrow, or a set of opposing arrows.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
equation   (ĭ-kwā'zhən)  Pronunciation Key 
  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.


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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

equation definition


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 American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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