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2 definitions found
 for Black drop
From The Collaborative International Dictionary of English v.0.48 :

  Black \Black\ (bl[a^]k), a. [OE. blak, AS. bl[ae]c; akin to
     Icel. blakkr dark, swarthy, Sw. bl[aum]ck ink, Dan. bl[ae]k,
     OHG. blach, LG. & D. blaken to burn with a black smoke. Not
     akin to AS. bl[=a]c, E. bleak pallid. [root]98.]
     1. Destitute of light, or incapable of reflecting it; of the
        color of soot or coal; of the darkest or a very dark
        color, the opposite of white; characterized by such a
        color; as, black cloth; black hair or eyes.
        [1913 Webster]
              O night, with hue so black!           --Shak.
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     2. In a less literal sense: Enveloped or shrouded in
        darkness; very dark or gloomy; as, a black night; the
        heavens black with clouds.
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              I spy a black, suspicious, threatening cloud.
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     3. Fig.: Dismal, gloomy, or forbidding, like darkness;
        destitute of moral light or goodness; atrociously wicked;
        cruel; mournful; calamitous; horrible. "This day's black
        fate." "Black villainy." "Arise, black vengeance." "Black
        day." "Black despair." --Shak.
        [1913 Webster]
     4. Expressing menace, or discontent; threatening; sullen;
        foreboding; as, to regard one with black looks.
        [1913 Webster]
     Note: Black is often used in self-explaining compound words;
           as, black-eyed, black-faced, black-haired,
           [1913 Webster]
     Black act, the English statute 9 George I, which makes it a
        felony to appear armed in any park or warren, etc., or to
        hunt or steal deer, etc., with the face blackened or
        disguised. Subsequent acts inflicting heavy penalties for
        malicious injuries to cattle and machinery have been
        called black acts.
     Black angel (Zool.), a fish of the West Indies and Florida
        ({Holacanthus tricolor), with the head and tail yellow,
        and the middle of the body black.
     Black antimony (Chem.), the black sulphide of antimony,
        Sb2S3, used in pyrotechnics, etc.
     Black bear (Zool.), the common American bear ({Ursus
     Black beast. See B[^e]te noire.
     Black beetle (Zool.), the common large cockroach ({Blatta
     Black bonnet (Zool.), the black-headed bunting ({Embriza
        Sch[oe]niclus) of Europe.
     Black canker, a disease in turnips and other crops,
        produced by a species of caterpillar.
     Black cat (Zool.), the fisher, a quadruped of North America
        allied to the sable, but larger. See Fisher.
     Black cattle, any bovine cattle reared for slaughter, in
        distinction from dairy cattle. [Eng.]
     Black cherry. See under Cherry.
     Black cockatoo (Zool.), the palm cockatoo. See Cockatoo.
     Black copper. Same as Melaconite.
     Black currant. (Bot.) See Currant.
     Black diamond. (Min.) See Carbonado.
     Black draught (Med.), a cathartic medicine, composed of
        senna and magnesia.
     Black drop (Med.), vinegar of opium; a narcotic preparation
        consisting essentially of a solution of opium in vinegar.
     Black earth, mold; earth of a dark color. --Woodward.
     Black flag, the flag of a pirate, often bearing in white a
        skull and crossbones; a signal of defiance.
     Black+flea+(Zool.),+a+flea+beetle+({Haltica+nemorum">Black flea (Zool.), a flea beetle ({Haltica nemorum)
        injurious to turnips.
     Black flux, a mixture of carbonate of potash and charcoal,
        obtained by deflagrating tartar with half its weight of
        niter. --Brande & C.
     Black Forest [a translation of G. Schwarzwald], a forest in
        Baden and W["u]rtemburg, in Germany; a part of the ancient
        Hercynian forest.
     Black game, or Black grouse. (Zool.) See Blackcock,
        Grouse, and Heath grouse.
     Black grass (Bot.), a grasslike rush of the species Juncus
        Gerardi, growing on salt marshes, and making good hay.
     Black gum (Bot.), an American tree, the tupelo or
        pepperidge. See Tupelo.
     Black Hamburg (grape) (Bot.), a sweet and juicy variety of
        dark purple or "black" grape.
     Black horse (Zool.), a fish of the Mississippi valley
        ({Cycleptus elongatus), of the sucker family; the
        Missouri sucker.
     Black lemur (Zool.), the Lemurniger of Madagascar; the
        acoumbo of the natives.
     Black list, a list of persons who are for some reason
        thought deserving of censure or punishment; -- esp. a list
        of persons stigmatized as insolvent or untrustworthy, made
        for the protection of tradesmen or employers. See
        Blacklist, v. t.
     Black manganese (Chem.), the black oxide of manganese,
     Black Maria, the close wagon in which prisoners are carried
        to or from jail.
     Black martin (Zool.), the chimney swift. See Swift.
     Black moss (Bot.), the common so-called long moss of the
        southern United States. See Tillandsia.
     Black oak. See under Oak.
     Black ocher. See Wad.
     Black pigment, a very fine, light carbonaceous substance,
        or lampblack, prepared chiefly for the manufacture of
        printers' ink. It is obtained by burning common coal tar.
     Black plate, sheet iron before it is tinned. --Knight.
     Black quarter, malignant anthrax with engorgement of a
        shoulder or quarter, etc., as of an ox.
     Black rat (Zool.), one of the species of rats ({Mus
        rattus), commonly infesting houses.
     Black rent. See Blackmail, n., 3.
     Black rust, a disease of wheat, in which a black, moist
        matter is deposited in the fissures of the grain.
     Black sheep, one in a family or company who is unlike the
        rest, and makes trouble.
     Black silver. (Min.) See under Silver.
     Black and tan, black mixed or spotted with tan color or
        reddish brown; -- used in describing certain breeds of
     Black tea. See under Tea.
     Black tin (Mining), tin ore (cassiterite), when dressed,
        stamped and washed, ready for smelting. It is in the form
        of a black powder, like fine sand. --Knight.
     Black walnut. See under Walnut.
     Black+warrior+(Zool.),+an+American+hawk+({Buteo+Harlani">Black warrior (Zool.), an American hawk ({Buteo Harlani).
        [1913 Webster]
     Syn: Dark; murky; pitchy; inky; somber; dusky; gloomy; swart;
          Cimmerian; ebon; atrocious.
          [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Drop \Drop\ (dr[o^]p), n. [OE. drope, AS. dropa; akin to OS.
     dropo, D. drop, OHG. tropo, G. tropfen, Icel. dropi, Sw.
     droppe; and Fr. AS. dre['o]pan to drip, drop; akin to OS.
     driopan, D. druipen, OHG. triofan, G. triefen, Icel.
     drj[=u]pa. Cf. Drip, Droop.]
     1. The quantity of fluid which falls in one small spherical
        mass; a liquid globule; a minim; hence, also, the smallest
        easily measured portion of a fluid; a small quantity; as,
        a drop of water.
        [1913 Webster]
              With minute drops from off the eaves. --Milton.
        [1913 Webster]
              As dear to me as are the ruddy drops
              That visit my sad heart.              -- Shak.
        [1913 Webster]
              That drop of peace divine.            --Keble.
        [1913 Webster]
     2. That which resembles, or that which hangs like, a liquid
        drop; as a hanging diamond ornament, an earring, a glass
        pendant on a chandelier, a sugarplum (sometimes
        medicated), or a kind of shot or slug.
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     3. (Arch.)
        (a) Same as Gutta.
        (b) Any small pendent ornament.
            [1913 Webster]
     4. Whatever is arranged to drop, hang, or fall from an
        elevated position; also, a contrivance for lowering
        something; as:
        (a) A door or platform opening downward; a trap door; that
            part of the gallows on which a culprit stands when he
            is to be hanged; hence, the gallows itself.
        (b) A machine for lowering heavy weights, as packages,
            coal wagons, etc., to a ship's deck.
        (c) A contrivance for temporarily lowering a gas jet.
        (d) A curtain which drops or falls in front of the stage
            of a theater, etc.
        (e) A drop press or drop hammer.
        (f) (Mach.) The distance of the axis of a shaft below the
            base of a hanger.
            [1913 Webster]
     5. pl. Any medicine the dose of which is measured by drops;
        as, lavender drops.
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     6. (Naut.) The depth of a square sail; -- generally applied
        to the courses only. --Ham. Nav. Encyc.
        [1913 Webster]
     7. Act of dropping; sudden fall or descent.
        [1913 Webster]
     Ague drop, Black drop. See under Ague, Black.
     Drop by drop, in small successive quantities; in repeated
        portions. "Made to taste drop by drop more than the
        bitterness of death." --Burke.
     Drop curtain. See Drop, n., 4.
        (d) .
     Drop forging. (Mech.)
        (a) A forging made in dies by a drop hammer.
        (b) The process of making drop forgings.
     Drop hammer (Mech.), a hammer for forging, striking up
        metal, etc., the weight being raised by a strap or similar
        device, and then released to drop on the metal resting on
        an anvil or die.
     Drop kick (Football), a kick given to the ball as it
        rebounds after having been dropped from the hands.
     Drop lake, a pigment obtained from Brazil wood. --Mollett.
     Drop letter, a letter to be delivered from the same office
        where posted.
     Drop press (Mech.), a drop hammer; sometimes, a dead-stroke
        hammer; -- also called drop.
     Drop scene, a drop curtain on which a scene is painted. See
        Drop, n., 4.
        (d) .
     Drop seed. (Bot.) See the List under Glass.
     Drop serene. (Med.) See Amaurosis.
        [1913 Webster]

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