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 on the fly 添加此单词到默认生词本
在飞行中, 不工作, 闲混



    on the fly
    [ adv ]
    on the run or in a hurry
    <adv.all>
    she wrote those letters on the fly


    Fly \Fly\, n.; pl. {Flies} (fl[imac]z). [OE. flie, flege, AS.
    fl[=y]ge, fle['o]ge, fr. fle['o]gan to fly; akin to D. vlieg,
    OHG. flioga, G. fliege, Icel. & Sw. fluga, Dan. flue. [root]
    84. See {Fly}, v. i.]
    1. (Zo["o]l.)
    (a) Any winged insect; esp., one with transparent wings;
    as, the Spanish fly; firefly; gall fly; dragon fly.
    (b) Any dipterous insect; as, the house fly; flesh fly;
    black fly. See {Diptera}, and Illust. in Append.

    2. A hook dressed in imitation of a fly, -- used for fishing.
    ``The fur-wrought fly.'' --Gay.

    3. A familiar spirit; a witch's attendant. [Obs.]

    A trifling fly, none of your great familiars. --B.
    Jonson.

    4. A parasite. [Obs.] --Massinger.

    5. A kind of light carriage for rapid transit, plying for
    hire and usually drawn by one horse. [Eng.]

    6. The length of an extended flag from its staff; sometimes,
    the length from the ``union'' to the extreme end.

    7. The part of a vane pointing the direction from which the
    wind blows.

    8. (Naut.) That part of a compass on which the points are
    marked; the compass card. --Totten.

    9. (Mech.)
    (a) Two or more vanes set on a revolving axis, to act as a
    fanner, or to equalize or impede the motion of
    machinery by the resistance of the air, as in the
    striking part of a clock.
    (b) A heavy wheel, or cross arms with weights at the ends
    on a revolving axis, to regulate or equalize the
    motion of machinery by means of its inertia, where the
    power communicated, or the resistance to be overcome,
    is variable, as in the steam engine or the coining
    press. See {Fly wheel} (below).

    10. (Knitting Machine) The piece hinged to the needle, which
    holds the engaged loop in position while the needle is
    penetrating another loop; a latch. --Knight.

    11. The pair of arms revolving around the bobbin, in a
    spinning wheel or spinning frame, to twist the yarn.

    12. (Weaving) A shuttle driven through the shed by a blow or
    jerk. --Knight.

    13.
    (a) Formerly, the person who took the printed sheets from
    the press.
    (b) A vibrating frame with fingers, attached to a power
    to a power printing press for doing the same work.

    14. The outer canvas of a tent with double top, usually drawn
    over the ridgepole, but so extended as to touch the roof
    of the tent at no other place.

    15. One of the upper screens of a stage in a theater.

    16. The fore flap of a bootee; also, a lap on trousers,
    overcoats, etc., to conceal a row of buttons.

    17. (Baseball) A batted ball that flies to a considerable
    distance, usually high in the air; also, the flight of a
    ball so struck; as, it was caught on the fly. Also called
    {fly ball}. ``a fly deep into right field''
    [1913 Webster +PJC]

    18. (Cotton Manuf.) Waste cotton.
    [Webster 1913 Suppl.]

    {Black fly}, {Cheese fly}, {Dragon fly, etc.} See under
    {Black}, {Cheese}, etc. -- {Fly agaric} (Bot.), a mushroom
    ({Agaricus muscarius}), having a narcotic juice which, in
    sufficient quantities, is poisonous. -- {Fly block}
    (Naut.), a pulley whose position shifts to suit the
    working of the tackle with which it is connected; -- used
    in the hoisting tackle of yards. -- {Fly board} (Printing
    Press), the board on which printed sheets are deposited by
    the fly. -- {Fly book}, a case in the form of a book for
    anglers' flies. --Kingsley.{Fly cap}, a cap with wings,
    formerly worn by women. -- {Fly drill}, a drill having a
    reciprocating motion controlled by a fly wheel, the
    driving power being applied by the hand through a cord
    winding in reverse directions upon the spindle as it
    rotates backward and forward. --Knight.{Fly fishing}, the
    act or art of angling with a bait of natural or artificial
    flies; fishing using a fly[2] as bait. --Walton. -- --
    {Fly fisherman}, one who fishes using natural or artificial
    flies[2] as bait, especially one who fishes exclusively in
    that manner. -- {Fly flap}, an implement for killing
    flies. -- {Fly governor}, a governor for regulating the
    speed of an engine, etc., by the resistance of vanes
    revolving in the air. -- {Fly honeysuckle} (Bot.), a plant
    of the honeysuckle genus ({Lonicera}), having a bushy stem
    and the flowers in pairs, as {L. ciliata} and {L.
    Xylosteum}. -- {Fly hook}, a fishhook supplied with an
    artificial fly. -- {Fly leaf}, an unprinted leaf at the
    beginning or end of a book, circular, programme, etc. --
    {Fly maggot}, a maggot bred from the egg of a fly. --Ray.

    {Fly net}, a screen to exclude insects.

    {Fly nut} (Mach.), a nut with wings; a thumb nut; a finger
    nut.

    {Fly orchis} (Bot.), a plant ({Ophrys muscifera}), whose
    flowers resemble flies.

    {Fly paper}, poisoned or sticky paper for killing flies that
    feed upon or are entangled by it.

    {Fly powder}, an arsenical powder used to poison flies.

    {Fly press}, a screw press for punching, embossing, etc.,
    operated by hand and having a heavy fly.

    {Fly rail}, a bracket which turns out to support the hinged
    leaf of a table.

    {Fly rod}, a light fishing rod used in angling with a fly.

    {Fly sheet}, a small loose advertising sheet; a handbill.

    {Fly snapper} (Zo["o]l.), an American bird ({Phainopepla
    nitens}), allied to the chatterers and shrikes. The male
    is glossy blue-black; the female brownish gray.

    {Fly wheel} (Mach.), a heavy wheel attached to machinery to
    equalize the movement (opposing any sudden acceleration by
    its inertia and any retardation by its momentum), and to
    accumulate or give out energy for a variable or
    intermitting resistance. See {Fly}, n., 9.

    {On the fly} (Baseball), still in the air; -- said of a
    batted ball caught before touching the ground..

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