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2 definitions found
 for Equation of time
From The Collaborative International Dictionary of English v.0.48 :

  Time \Time\, n.; pl. Times. [OE. time, AS. t[imac]ma, akin to
     t[imac]d time, and to Icel. t[imac]mi, Dan. time an hour, Sw.
     timme. [root]58. See Tide, n.]
     1. Duration, considered independently of any system of
        measurement or any employment of terms which designate
        limited portions thereof.
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              The time wasteth [i. e. passes away] night and day.
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              I know of no ideas . . . that have a better claim to
              be accounted simple and original than those of space
              and time.                             --Reid.
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     2. A particular period or part of duration, whether past,
        present, or future; a point or portion of duration; as,
        the time was, or has been; the time is, or will be.
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              God, who at sundry times and in divers manners spake
              in time past unto the fathers by the prophets.
                                                    --Heb. i. 1.
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     3. The period at which any definite event occurred, or person
        lived; age; period; era; as, the Spanish Armada was
        destroyed in the time of Queen Elizabeth; -- often in the
        plural; as, ancient times; modern times.
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     4. The duration of one's life; the hours and days which a
        person has at his disposal.
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              Believe me, your time is not your own; it belongs to
              God, to religion, to mankind.         --Buckminster.
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     5. A proper time; a season; an opportunity.
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              There is . . . a time to every purpose. --Eccl. iii.
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              The time of figs was not yet.         --Mark xi. 13.
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     6. Hour of travail, delivery, or parturition.
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              She was within one month of her time. --Clarendon.
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     7. Performance or occurrence of an action or event,
        considered with reference to repetition; addition of a
        number to itself; repetition; as, to double cloth four
        times; four times four, or sixteen.
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              Summers three times eight save one.   --Milton.
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     8. The present life; existence in this world as contrasted
        with immortal life; definite, as contrasted with infinite,
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              Till time and sin together cease.     --Keble.
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     9. (Gram.) Tense.
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     10. (Mus.) The measured duration of sounds; measure; tempo;
         rate of movement; rhythmical division; as, common or
         triple time; the musician keeps good time.
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               Some few lines set unto a solemn time. --Beau. &
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     Note: Time is often used in the formation of compounds,
           mostly self-explaining; as, time-battered,
           time-beguiling, time-consecrated, time-consuming,
           time-enduring, time-killing, time-sanctioned,
           time-scorner, time-wasting, time-worn, etc.
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     Absolute time, time irrespective of local standards or
        epochs; as, all spectators see a lunar eclipse at the same
        instant of absolute time.
     Apparent time, the time of day reckoned by the sun, or so
        that 12 o'clock at the place is the instant of the transit
        of the sun's center over the meridian.
     Astronomical time, mean solar time reckoned by counting the
        hours continuously up to twenty-four from one noon to the
     At times, at distinct intervals of duration; now and then;
        as, at times he reads, at other times he rides.
     Civil time, time as reckoned for the purposes of common
        life in distinct periods, as years, months, days, hours,
        etc., the latter, among most modern nations, being divided
        into two series of twelve each, and reckoned, the first
        series from midnight to noon, the second, from noon to
     Common time (Mil.), the ordinary time of marching, in which
        ninety steps, each twenty-eight inches in length, are
        taken in one minute.
     Equation of time. See under Equation, n.
     In time.
         (a) In good season; sufficiently early; as, he arrived in
             time to see the exhibition.
         (b) After a considerable space of duration; eventually;
             finally; as, you will in time recover your health and
     Mean time. See under 4th Mean.
     Quick time (Mil.), time of marching, in which one hundred
        and twenty steps, each thirty inches in length, are taken
        in one minute.
     Sidereal time. See under Sidereal.
     Standard time, the civil time that has been established by
        law or by general usage over a region or country. In
        England the standard time is Greenwich mean solar time. In
        the United States and Canada four kinds of standard time
        have been adopted by the railroads and accepted by the
        people, viz., Eastern, Central, Mountain, and Pacific
        time, corresponding severally to the mean local times of
        the 75th, 90th, 105th, and 120th meridians west from
        Greenwich, and being therefore five, six, seven, and eight
        hours slower than Greenwich time.
     Time ball, a ball arranged to drop from the summit of a
        pole, to indicate true midday time, as at Greenwich
        Observatory, England. --Nichol.
     Time bargain (Com.), a contract made for the sale or
        purchase of merchandise, or of stock in the public funds,
        at a certain time in the future.
     Time bill. Same as Time-table. [Eng.]
     Time book, a book in which is kept a record of the time
        persons have worked.
     Time detector, a timepiece provided with a device for
        registering and indicating the exact time when a watchman
        visits certain stations in his beat.
     Time enough, in season; early enough. "Stanly at Bosworth
        field, . . . came time enough to save his life." --Bacon.
     Time fuse, a fuse, as for an explosive projectile, which
        can be so arranged as to ignite the charge at a certain
        definite interval after being itself ignited.
     Time immemorial, or Time out of mind. (Eng. Law) See
        under Immemorial.
     Time lock, a lock having clockwork attached, which, when
        wound up, prevents the bolt from being withdrawn when
        locked, until a certain interval of time has elapsed.
     Time of day, salutation appropriate to the times of the
        day, as "good morning," "good evening," and the like;
     To kill time. See under Kill, v. t.
     To make time.
         (a) To gain time.
         (b) To occupy or use (a certain) time in doing something;
             as, the trotting horse made fast time.
     To move against time, To run against time, or To go
     against time, to move, run, or go a given distance without a
        competitor, in the quickest possible time; or, to
        accomplish the greatest distance which can be passed over
        in a given time; as, the horse is to run against time.
     True time.
         (a) Mean time as kept by a clock going uniformly.
         (b) (Astron.) Apparent time as reckoned from the transit
             of the sun's center over the meridian.
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From The Collaborative International Dictionary of English v.0.48 :

  Equation \E*qua"tion\, n. [L. aequatio an equalizing: cf. F.
     ['e]quation equation. See Equate.]
     1. A making equal; equal division; equality; equilibrium.
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              Again the golden day resumed its right,
              And ruled in just equation with the night. --Rowe.
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     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.
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     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.
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     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
     Equation of a curve (Math.), an equation which expresses
        the relation between the co["o]rdinates 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
     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.
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