DICT.TW Dictionary Taiwan

 Lag n.
 1. One who lags; that which comes in last. [Obs.] “The lag of all the flock.”
 2. The fag-end; the rump; hence, the lowest class.
    The common lag of people.   --Shak.
 3. The amount of retardation of anything, as of a valve in a steam engine, in opening or closing.
 4. A stave of a cask, drum, etc.; especially: Mach., one of the narrow boards or staves forming the covering of a cylindrical object, as a boiler, or the cylinder of a carding machine or a steam engine.
 5. Zool. See Graylag.
 6. The failing behind or retardation of one phenomenon with respect to another to which it is closely related; as, the lag of magnetization compared with the magnetizing force (hysteresis); the lag of the current in an alternating circuit behind the impressed electro-motive force which produced it.
 Lag of the tide, the interval by which the time of high water falls behind the mean time, in the first and third quarters of the moon; -- opposed to priming of the tide, or the acceleration of the time of high water, in the second and fourth quarters; depending on the relative positions of the sun and moon.
 Lag screw, an iron bolt with a square head, a sharp-edged thread, and a sharp point, adapted for screwing into wood; a screw for fastening lags.

 Prim·ing n.
 1. The powder or other combustible used to communicate fire to a charge of gunpowder, as in a firearm.
 2. Paint. The first coating of color, size, or the like, laid on canvas, or on a building, or other surface.
 3. Steam Eng. The carrying over of water, with the steam, from the boiler, as into the cylinder.
 Priming of the tide. See Lag of the tide, under 2d Lag.
 Priming tube, a small pipe, filled with a combustible composition for firing cannon.
 Priming valve Steam Eng., a spring safety valve applied to the cylinder of a steam engine for discharging water carried into the cylinder by priming.
 Priming wire, a pointed wire used to penetrate the vent of a piece, for piercing the cartridge before priming.
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 Tide n.
 1. Time; period; season. [Obsoles.] “This lusty summer's tide.”
    And rest their weary limbs a tide.   --Spenser.
 Which, at the appointed tide,
 Each one did make his bride.   --Spenser.
    At the tide of Christ his birth.   --Fuller.
 2. The alternate rising and falling of the waters of the ocean, and of bays, rivers, etc., connected therewith. The tide ebbs and flows twice in each lunar day, or the space of a little more than twenty-four hours. It is occasioned by the attraction of the sun and moon (the influence of the latter being three times that of the former), acting unequally on the waters in different parts of the earth, thus disturbing their equilibrium. A high tide upon one side of the earth is accompanied by a high tide upon the opposite side. Hence, when the sun and moon are in conjunction or opposition, as at new moon and full moon, their action is such as to produce a greater than the usual tide, called the spring tide, as represented in the cut. When the moon is in the first or third quarter, the sun's attraction in part counteracts the effect of the moon's attraction, thus producing under the moon a smaller tide than usual, called the neap tide.
 Note: ☞ The flow or rising of the water is called flood tide, and the reflux, ebb tide.
 3. A stream; current; flood; as, a tide of blood. “Let in the tide of knaves once more; my cook and I'll provide.”
 4. Tendency or direction of causes, influences, or events; course; current.
 There is a tide in the affairs of men,
 Which, taken at the flood, leads on to fortune.   --Shak.
 5. Violent confluence. [Obs.]
 6. Mining The period of twelve hours.
 Atmospheric tides, tidal movements of the atmosphere similar to those of the ocean, and produced in the same manner by the attractive forces of the sun and moon.
 Inferior tide. See under Inferior, a.
 To work double tides. See under Work, v. t.
 Tide day, the interval between the occurrences of two consecutive maxima of the resultant wave at the same place. Its length varies as the components of sun and moon waves approach to, or recede from, one another. A retardation from this cause is called the lagging of the tide, while the acceleration of the recurrence of high water is termed the priming of the tide. See Lag of the tide, under 2d Lag.
 Tide dial, a dial to exhibit the state of the tides at any time.
 Tide gate. (a) An opening through which water may flow freely when the tide sets in one direction, but which closes automatically and prevents the water from flowing in the other direction. (b) Naut. A place where the tide runs with great velocity, as through a gate.
 Tide gauge, a gauge for showing the height of the tide; especially, a contrivance for registering the state of the tide continuously at every instant of time. --Brande & C.
 Tide lock, a lock situated between an inclosed basin, or a canal, and the tide water of a harbor or river, when they are on different levels, so that craft can pass either way at all times of the tide; -- called also guard lock.
 Tide mill. a A mill operated by the tidal currents. (b) A mill for clearing lands from tide water.
 Tide rip, a body of water made rough by the conflict of opposing tides or currents.
 Tide table, a table giving the time of the rise and fall of the tide at any place.
 Tide water, water affected by the flow of the tide; hence, broadly, the seaboard.
 Tide wave, or  Tidal wave, the swell of water as the tide moves. That of the ocean is called primitive; that of bays or channels derivative.  See also tidal wave in the vocabulary. --Whewell.
 Tide wheel, a water wheel so constructed as to be moved by the ebb or flow of the tide.