equation : Idioms & Phrases

• (Astron.), the sum of the optic and eccentric equations.

Webster 1913

• noun an equation of the fourth degree
  biquadratic.
  

WordNet

• (Alg.), an equation of the fourth degree, or an equation in some term of which the unknown quantity is raised to the fourth power.

Webster 1913

• (Math.), the drawing of such lines and figures as will represent geometrically the quantities in the equation, and their relations to each other.

Webster 1913

• an equation in which the highest power of the unknown quantity is a cube.

Webster 1913

• (Math.), those that are finite in the number of values or solutions, that is, in which the conditions of the problem or equation determine the number.

Webster 1913

• noun an equation containing differentials of a function
  

WordNet

• (Math.), the operation of assigning different reasonable values to the arbitrary quantities and interpreting the result.

Webster 1913

• a timepiece made to exhibit the differences between mean solar and apparent solar time. Knight.

Webster 1913

• 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.

Webster 1913

• (Math.), an equation which expresses the relation between the coördinates of every point in the curve.

Webster 1913

• (Astron.), the difference between the mean and apparent places of the equinox.

Webster 1913

• (Arith.), the process of finding the mean time of payment of several sums due at different times.

Webster 1913

• (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.

Webster 1913

• (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.

Webster 1913

• (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.

Webster 1913

• noun an equation involving exponential functions of a variable
  

WordNet

• an equation which contains an exponential quantity, or in which the unknown quantity enters as an exponent.

Webster 1913

• (Alg.), an equation which is true for all values of the algebraic symbols which enter into it.

Webster 1913

• (Alg.), an equation some of whose terms are wanting; or one in which the coefficient of some one or more of the powers of the unknown quantity is equal to 0.

Webster 1913

• (Math.), an equation in which the unknown quantities admit of an infinite number of values, or sets of values. A group of equations is indeterminate when it contains more unknown quantities than there are equations.

Webster 1913

• (Geom.), the equation which expresses the relation which the length of a curve, measured from a given point of it, to a movable point, has to the angle which the tangent to the curve at the movable point makes with a fixed line.

Webster 1913

• (Math.), an equation of the first degree. Obs.

Webster 1913

• noun a polynomial equation of the first degree
  

WordNet

• (Math.), an equation of the first degree between two variables; so called because every such equation may be considered as representing a right line. = straight line!

Webster 1913

• (Math.), an equation in which known quantities are expressed either wholly or in part by means of letters; distinguished from a numerical equation.

Webster 1913

• noun four differential equations that summarize classical properties of electromagnetic fields
  

WordNet

• . See under Normal.

Webster 1913

• (Method of Least Squares), a set of equations of the first degree equal in number to the number of unknown quantities, and derived from the observations by a specified process. The solution of the normal equations gives the most probable values of the unknown quantities.

Webster 1913

• (Alg.), an equation which has all the quantities except the unknown expressed in numbers; distinguished from literal equation.

Webster 1913

• (Math.), the greatest index of differentiation in the equation.

Webster 1913

• noun a differential equation involving a functions of more than one variable
  

WordNet

• noun variability attributable to individual differences
  

WordNet

• (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.

Webster 1913

• an equation which expresses the relation between the polar coördinates of every point of the line or surface.

Webster 1913

• noun an equation in which the highest power of an unknown quantity is a square
  quadratic.
  

WordNet

• (Math.), one which remains unchanged in form when the reciprocal of the unknown quantity is substituted for that quantity.

Webster 1913

• noun the equation representing the relation between selected values of one variable (x) and observed values of the other (y); it permits the prediction of the most probable values of y
  regression of y on x.
  

WordNet

• (Alg.), that value which, substituted for the unknown quantity in an equation, satisfies the equation.

Webster 1913

• noun the fundamental equation of wave mechanics
  Schrodinger equation.
  

WordNet

• noun the fundamental equation of wave mechanics
  Schrodinger equation.
  

WordNet

• (Astron.), the algebraic or numerical expression of the magnitude of the inequalities in a planet's motion that remain after the inequalities of a short period have been allowed for.

Webster 1913

• (Alg.), an eqyation containing but one unknown quantity, and that quantity only in the first degree.

Webster 1913

• noun a set of equations in two or more variables for which there are values that can satisfy all the equations simultaneously
  

WordNet

• (Alg.), two or more equations in which the values of the unknown quantities entering them are the same at the same time in both or in all.

Webster 1913

• (Math.), the branch of algebra that treats of the properties of a single algebraic equation of any degree containing one unknown quantity.

Webster 1913

• (Alg.), to bring the unknown quantity by itself on one side, and all the known quantities on the other side, without destroying the equation.

Webster 1913

• (Math.), an equation into which a transcendental function of one of the unknown or variable quantities enters.

Webster 1913

• (Math.), the operation of testing the equation of a problem, to see whether it expresses truly the conditions of the problem.

Webster 1913

• noun a differential equation that describes the passage of harmonic waves through a medium
  

WordNet

• (Crystallog.), the mathematical relation which belongs to all the planes of a zone, and expresses their common position with reference to the axes.

Webster 1913