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Quadric :: Quadric (n.) A surface whose equation in three variables is of the second degree. Spheres, spheroids, ellipsoids, paraboloids, hyperboloids, also cones and cylinders with circular bases, are quadrics..

Biquadratic :: Biquadratic (n.) A biquadratic equation.

Equation :: Equation (n.) 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..

Inequation :: Inequation (n.) An inequality.

Parabolism :: Parabolism (n.) The division of the terms of an equation by a known quantity that is involved in the first term.

Acnode :: Acnode (n.) An isolated point not upon a curve, but whose coordinates satisfy the equation of the curve so that it is considered as belonging to the curve..

Plexus :: Plexus (n.) The system of equations required for the complete expression of the relations which exist between a set of quantities.

Sinusoid :: Sinusoid (n.) The curve whose ordinates are proportional to the sines of the abscissas, the equation of the curve being y = a sin x. It is also called the curve of sines..

Degree :: Degree (n.) State as indicated by sum of exponents; more particularly, the degree of a term is indicated by the sum of the exponents of its literal factors; thus, a2b3c is a term of the sixth degree. The degree of a power, or radical, is denoted by its index, that of an equation by the greatest sum of the exponents of the unknown quantities in any term; thus, ax4 + bx2 = c, and mx2y2 + nyx = p, are both equations of the fourth degree..

Transposition :: Transposition (n.) The bringing of any term of an equation from one side over to the other without destroying the equation.

Adequation :: Adequation (n.) The act of equalizing; act or result of making adequate; an equivalent.

Depression :: Depression (n.) The operation of reducing to a lower degree; -- said of equations.

Differentiate :: Differentiate (v. t.) To obtain the differential, or differential coefficient, of; as, to differentiate an algebraic expression, or an equation..

Lima/on :: Lima/on (n.) A curve of the fourth degree, invented by Pascal. Its polar equation is r = a cos / + b..

Analysis :: Analysis (n.) The resolving of problems by reducing the conditions that are in them to equations.

Identity :: Identity (n.) An identical equation.

Quartic :: Quartic (n.) A curve or surface whose equation is of the fourth degree in the variables.

Elimination :: Elimination (n.) Act of causing a quantity to disappear from an equation; especially, in the operation of deducing from several equations containing several unknown quantities a less number of equations containing a less number of unknown quantities..

Equation :: Equation (n.) A making equal; equal division; equality; equilibrium.

Inadequation :: Inadequation (n.) Want of exact correspondence.

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