[ih-kwey-zhuh n, -shuh n] /ɪˈkweɪ ʒən, -ʃən/

the act of 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.
/ɪˈkweɪʒən; -ʃən/
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)
the act of regarding as equal; equating
the act of making equal or balanced; equalization
a situation, esp one regarded as having a number of conflicting elements: what you want doesn’t come into the equation
the state of being equal, equivalent, or equally balanced
a situation or problem in which a number of factors need to be considered
See chemical equation
(astronomy) See personal 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.

equation e·qua·tion (ĭ-kwā’zhən, -shən)


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.


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