English-Thai Dictionary

equation

N ความเท่าเทียมกัน  ความ สมดุล  balance equality equivalence kwam-tao-tiam-kan

 

equation

N สมการ (ค ณิตศาสตร์  sam-ma-kan

 

Webster's 1828 Dictionary

EQUATION

n.[L. oequatio, from oequo, to make equal or level. ] 1. Literally, a making equal, or an equal division.
2. In algebra, a proposition asserting the equality of two quantities, and expressed by the sign =between them; or an expression of the same quantity in two dissimilar terms, but of equal value, as 3s =36d, or x =br. In the latter case, x is equal to be added to m, with r subtracted, and the quantities on the right hand of the sign of equation are said to be the value of x on the left hand.
3. In astronomy, the reduction of the apparent time or motion of the sun to equable, mean or true time.
4. The reduction of any extremes to a mean proportion.

 

Webster's 1913 Dictionary

EQUATION

E *qua "tion, n. Etym: [L. aequatio an equalizing: cf. F. équation equation. See Equate. ]

 

1. A making equal; equal division; equality; equilibrium. Again the golden day resumed its right, And ruled in just equation with the night. Rowe.

 

2. (Math. )

 

Defn: An expression of the condition of equality between two algebraic quantities or sets of quantities, the sign = being placed between them; as, a binomial equation; a quadratic equation; an algebraic equation; a transcendental equation; an exponential equation; a logarithmic equation; a differential equation, etc.

 

3. (Astron.)

 

Defn: A quantity to be applied in computing the mean place or other element of a celestial body; that is, any one of the several quantities to be added to, or taken from, its position as calculated on the hypothesis of a mean uniform motion, in order to find its true position as resulting from its actual and unequal motion. Absolute equation. See under Absolute. -- Equation box, or Equational box, a system of differential gearing used in spinning machines for regulating the twist of the yarn. It resembles gearing used in equation clocks for showing apparent time. -- Equation of the center (Astron.), the difference between the place of a planet as supposed to move uniformly in a circle, and its place as moving in an ellipse. -- Equations of condition (Math. ), equations formed for deducing the true values of certain quantities from others on which they depend, when different sets of the latter, as given by observation, would yield different values of the quantities sought, and the number of equations that may be found is greater than the number of unknown quantities. -- Equation of a curve (Math. ), an equation which expresses the relation between the coördinates of every point in the curve. -- Equation of equinoxes (Astron.), the difference between the mean and apparent places of the equinox. -- Equation of payments (Arith.), the process of finding the mean time of payment of several sums due at different times. -- Equation of time (Astron.), the difference between mean and apparent time, or between the time of day indicated by the sun, and that by a perfect clock going uniformly all the year round. -- Equation clock or watch, a timepiece made to exhibit the differences between mean solar and apparent solar time. Knight. -- Normal equation. See under Normal. -- Personal equation (Astron.), the difference between an observed result and the true qualities or peculiarities in the observer; particularly the difference, in an average of a large number of observation, between the instant when an observer notes a phenomenon, as the transit of a star, and the assumed instant of its actual occurrence; or, relatively, the difference between these instants as noted by two observers. It is usually only a fraction of a second; -- sometimes applied loosely to differences of judgment or method occasioned by temperamental qualities of individuals. -- Theory of equations (Math. ), the branch of algebra that treats of the properties of a single algebraic equation of any degree containing one unknown quantity.

 

New American Oxford Dictionary

equation

e qua tion |iˈkwāZHən əˈkweɪʒən | ▶noun 1 Mathematics a statement that the values of two mathematical expressions are equal (indicated by the sign =). 2 the process of equating one thing with another: the equation of science with objectivity. • (the equation ) a situation or problem in which several factors must be taken into account: money also came into the equation. 3 Chemistry a symbolic representation of the changes that occur in a chemical reaction, expressed in terms of the formulae of the molecules or other species involved. PHRASES equation of the first order, ( second order, etc. ) Mathematics an equation involving only the first derivative, second derivative, etc. ORIGIN late Middle English: from Latin aequatio (n- ), from aequare ‘make equal ’ (see equate ).

 

equational

e qua tion al |iˈkwāZHənəl əˈkweɪʒənl | ▶adjective another term for equative.

 

equation of state

e qua tion of state ▶noun Chemistry an equation showing the relationship between the values of the pressure, volume, and temperature of a quantity of a particular substance.

 

equation of time

e qua tion of time ▶noun the difference between mean solar time (as shown by clocks ) and apparent solar time (indicated by sundials ), which varies with the time of year.

 

Oxford Dictionary

equation

equation |ɪˈkweɪʒ (ə )n | ▶noun 1 Mathematics a statement that the values of two mathematical expressions are equal (indicated by the sign =). 2 [ mass noun ] the process of equating one thing with another: the equation of science with objectivity. • (the equation ) a situation in which several factors must be taken into account: money also came into the equation. 3 Chemistry a symbolic representation of the changes which occur in a chemical reaction, expressed in terms of the formulae of the molecules or other species involved. PHRASES equation of the first (or second etc. ) order Mathematics an equation involving only the first derivative, second derivative, etc. ORIGIN late Middle English: from Latin aequatio (n- ), from aequare ‘make equal ’ (see equate ).

 

equational

equa |tion ¦al ▶adjective another term for equative.

 

equation of state

equa |tion of state ▶noun Chemistry an equation showing the relationship between the values of the pressure, volume, and temperature of a quantity of a particular substance.

 

equation of time

equa |tion of time ▶noun the difference between mean solar time (as shown by clocks ) and apparent solar time (indicated by sundials ), which varies with the time of year.

 

American Oxford Thesaurus

equation

equation noun 1 a quadratic equation: mathematical problem, sum, calculation, question. 2 the equation of success with riches: identification, association, connection, matching; equivalence, correspondence, agreement, comparison. 3 other factors came into the equation: situation, problem, case, question; quandary, predicament.

 

Oxford Thesaurus

equation

equation noun 1 a boy was solving a quadratic equation: mathematical problem, sum, calculation, question; equality. 2 the equation of success with material rewards: equating, equalization, identification, association, connection, likening, matching; equivalence, likeness, identity, correspondence, agreement, comparison, balance, balancing. 3 (the equation ) other factors also came into the equation: the situation, the problem, the case, the question, the quandary, the predicament.

 

French Dictionary

équation

équation n. f. nom féminin mathématiques Relation conditionnelle entre deux quantités. : Une équation du premier degré, une équation algébrique. Prononciation Le u de la deuxième syllabe se prononce ou, [ekwasjɔ̃ ]

 

Sanseido Wisdom Dictionary

equation

e qua tion /ɪkwéɪʒ (ə )n, -ʃ (ə )n /名詞 1 C 〘数 化 〙方程式, 等式 ▸ solve an equation 方程式を解く ▸ a quadratic equation 2次方程式 2 U 同一視 ; 均等, 均一 ; 均衡 ; 等しくすること, 均一化 ; C (関係する難しい )問題 ▸ the equation of supply and demand 需要と供給の均衡 ▸ adjust the equation of international trade 国際貿易の均衡を図る .3 C 〘天 〙均差 ▸ the equation of time (真太陽時と平均太陽時との )均時差 ▸ a personal equation (観測上の )個人誤差