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2 definitions found
 for Mus rattus
From The Collaborative International Dictionary of English v.0.48 :

  Rat \Rat\ (r[a^]t), n. [AS. r[ae]t; akin to D. rat, OHG. rato,
     ratta, G. ratte, ratze, OLG. ratta, LG. & Dan. rotte, Sw.
     r[*a]tta, F. rat, Ir. & Gael radan, Armor. raz, of unknown
     origin. Cf. Raccoon.]
     1. (Zool.) One of several species of small rodents of the
        genus Rattus (formerly included in Mus) and allied
        genera, of the family Muridae, distinguished from mice
        primarily by being larger. They infest houses, stores, and
        ships, especially the Norway rat, also called brown rat,
        ({Rattus norvegicus formerly Mus decumanus), the black
        rat ({Rattus rattus formerly Mus rattus), and the roof
        rat (formerly Mus Alexandrinus, now included in Rattus
        rattus). These were introduced into America from the Old
        World. The white rat used most commonly in laboratories is
        primarily a strain derived from Rattus rattus.
        [1913 Webster +PJC]
     2. A round and tapering mass of hair, or similar material,
        used by women to support the puffs and rolls of their
        natural hair. [Local, U.S.]
        [1913 Webster]
     3. One who deserts his party or associates; hence, in the
        trades, one who works for lower wages than those
        prescribed by a trades union. [Cant]
        [1913 Webster]
     Note: "It so chanced that, not long after the accession of
           the house of Hanover, some of the brown, that is the
           German or Norway, rats, were first brought over to this
           country (in some timber as is said); and being much
           stronger than the black, or, till then, the common,
           rats, they in many places quite extirpated the latter.
           The word (both the noun and the verb to rat) was first,
           as we have seen, leveled at the converts to the
           government of George the First, but has by degrees
           obtained a wider meaning, and come to be applied to any
           sudden and mercenary change in politics." --Lord Mahon.
           [1913 Webster]
     Bamboo rat (Zool.), any Indian rodent of the genus
     Beaver rat, Coast rat. (Zool.) See under Beaver and
     Blind rat (Zool.), the mole rat.
     Cotton rat (Zool.), a long-haired rat ({Sigmodon
        hispidus), native of the Southern United States and
        Mexico. It makes its nest of cotton and is often injurious
        to the crop.
     Ground rat. See Ground Pig, under Ground.
     Hedgehog rat. See under Hedgehog.
     Kangaroo rat (Zool.), the potoroo.
     Norway rat (Zool.), the common brown rat. See Rat.
     Pouched rat. (Zool.)
        (a) See Pocket Gopher, under Pocket.
        (b) Any African rodent of the genus Cricetomys.
     Rat Indians (Ethnol.), a tribe of Indians dwelling near
        Fort Ukon, Alaska. They belong to the Athabascan stock.
     Rat mole. (Zool.) See Mole rat, under Mole.
     Rat pit, an inclosed space into which rats are put to be
        killed by a dog for sport.
     Rat snake (Zool.), a large colubrine snake ({Ptyas
        mucosus) very common in India and Ceylon. It enters
        dwellings, and destroys rats, chickens, etc.
     Spiny rat (Zool.), any South American rodent of the genus
     To smell a rat. See under Smell.
     Wood rat (Zool.), any American rat of the genus Neotoma,
        especially Neotoma Floridana, common in the Southern
        United States. Its feet and belly are white.
        [1913 Webster]

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.
        [1913 Webster]
     2. In a less literal sense: Enveloped or shrouded in
        darkness; very dark or gloomy; as, a black night; the
        heavens black with clouds.
        [1913 Webster]
              I spy a black, suspicious, threatening cloud.
        [1913 Webster]
     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]

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