a. [ L. adaequatus, p. p. of adaequare to make equal to; ad + aequare to make equal, aequus equal. See Equal. ] Equal to some requirement; proportionate, or correspondent; fully sufficient; as, powers adequate to a great work; an adequate definition. [ 1913 Webster ]

Ireland had no adequate champion. De Quincey. [ 1913 Webster ]

Syn. -- Proportionate; commensurate; sufficient; suitable; competent; capable. [ 1913 Webster ]

v. t. [ See Adequate, a. ] 1. To equalize; to make adequate. [ R. ] Fotherby. [ 1913 Webster ]

2. To equal. [ Obs. ] [ 1913 Webster ]

It [ is ] an impossibility for any creature to adequate God in his eternity. Shelford. [ 1913 Webster ]

adv. In an adequate manner. [ 1913 Webster ]

n. The quality of being adequate; suitableness; sufficiency; adequacy. [ 1913 Webster ]

n. [ L. adaequatio. ] The act of equalizing; act or result of making adequate; an equivalent. [ Obs. ] Bp. Barlow. [ 1913 Webster ]

v. t. [ imp. & p. p. Equated; p. pr. & vb. n. Equating. ] [ L. aequatus, p. p. of aequare to make level or equal, fr. aequus level, equal. See Equal. ] To make equal; to reduce to an average; to make such an allowance or correction in as will reduce to a common standard of comparison; to reduce to mean time or motion; as, to equate payments; to equate lines of railroad for grades or curves; equated distances. [ 1913 Webster ]

Palgrave gives both scrolle and scrowe and equates both to F[ rench ] rolle. Skeat (Etymol. Dict. ). [ 1913 Webster ]

Equating for grades (Railroad Engin.), adding to the measured distance one mile for each twenty feet of ascent. --
Equating for curves, adding half a mile for each 360 degrees of curvature. [ 1913 Webster ]

n. the act of regarding as equal.
Syn. -- equation. [ WordNet 1.5 ]

n. [ L. aequatio an equalizing: cf. F. équation equation. See Equate. ] 1. A making equal; equal division; equality; equilibrium. [ 1913 Webster ]

Again the golden day resumed its right,
And ruled in just equation with the night. Rowe. [ 1913 Webster ]

2. (Math.) 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. [ 1913 Webster ]

3. (Astron.) 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. [ 1913 Webster ]

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
Equation 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. [ 1913 Webster ]

n. [ L. aequator one who equalizes: cf. F. équateur equator. See Equate. ] 1. (Geog.) The imaginary great circle on the earth's surface, everywhere equally distant from the two poles, and dividing the earth's surface into two hemispheres. [ 1913 Webster ]

2. (Astron.) The great circle of the celestial sphere, coincident with the plane of the earth's equator; -- so called because when the sun is in it, the days and nights are of equal length; hence called also the equinoctial, and on maps, globes, etc., the equinoctial line. [ 1913 Webster ]

Equator of the sun or
Equator of a planet (Astron.), the great circle whose plane passes through through the center of the body, and is perpendicular to its axis of revolution. --
Magnetic equator. See Aclinic. [ 1913 Webster ]

a. [ Cf. F. équatorial. ] Of or pertaining to the equator; as, equatorial climates; also, pertaining to an equatorial instrument. [ 1913 Webster ]

n. (Astron.) An instrument consisting of a telescope so mounted as to have two axes of motion at right angles to each other, one of them parallel to the axis of the earth, and each carrying a graduated circle, the one for measuring declination, and the other right ascension, or the hour angle, so that the telescope may be directed, even in the daytime, to any star or other object whose right ascension and declination are known. The motion in right ascension is sometimes communicated by clockwork, so as to keep the object constantly in the field of the telescope. Called also an equatorial telescope. [ 1913 Webster ]

☞ The term equatorial, or equatorial instrument, is sometimes applied to any astronomical instrument which has its principal axis of rotation parallel to the axis of the earth. [ 1913 Webster ]

adv. So as to have motion or direction parallel to the equator. [ 1913 Webster ]

‖n. [ L., 3d pers. sing. pres. subj. of exequi, exsequi, to perform, execute. ] 1. A written official recognition of a consul or commercial agent, issued by the government to which he is accredited, and authorizing him to exercise his powers in the place to which he is assigned. [ 1913 Webster ]

2. Official recognition or permission. Prescott. [ 1913 Webster ]

a. [ Pref. in- not + adequate: cf. F. inadéquat. ] Not adequate; unequal to the purpose; insufficient; deficient; as, inadequate resources, power, conceptions, representations, etc. Dryden.

-- In*ad"e*quate*ly, adv. -- In*ad"e*quate*ness, n. [ 1913 Webster ]

n. Lack of exact correspondence. [ Obs. ] Puller. [ 1913 Webster ]

n. (Math.) An inequality. [ 1913 Webster ]

n. An imaginary line paralleling the equator where a magnetic needle has no dip, the dipping needle being horizontal; called also aclinic line. [ WordNet 1.5 ]

n. (physics) an equation expressing the mass of an object as a function of its velocity: as the velocity v of an object increases, its mass m increases from its rest mass m₀ according to the equation: m = m₀/1 - v2/c2 where c is the speed of light in a vacuum. If the speed of an object were to become equal to that of light, it can be seen that the mass would be infinite, from which it follows that nothing can accelerate up to or beyond the speed of light. [ PJC ]

☞ The theoretical possibility that there are particles which always move faster than light cannot at present be disproved and is not denied by this equation; in such a case, the relativistic mass equation asserts that such particles can never decelerate to or below the speed of light. Such hypothetical particles are referred to as
tachyons. [ PJC ]