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2 definitions found
 for Hedgehog rat
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 :

  Hedgehog \Hedge"hog`\, n.
     1. (Zool.) A small European insectivore ({Erinaceus
        Europ[ae]us), and other allied species of Asia and
        Africa, having the hair on the upper part of its body
        mixed with prickles or spines. It is able to roll itself
        into a ball so as to present the spines outwardly in every
        direction. It is nocturnal in its habits, feeding chiefly
        upon insects.
        [1913 Webster]
     2. (Zool.) The Canadian porcupine.[U.S]
        [1913 Webster]
     Medicago+({Medicago+intertexta">3. (Bot.) A species of Medicago ({Medicago intertexta),
        the pods of which are armed with short spines; --
        popularly so called. --Loudon.
        [1913 Webster]
     4. A form of dredging machine. --Knight.
        [1913 Webster]
     5. (Elec.) A variety of transformer with open magnetic
        circuit, the ends of the iron wire core being turned
        outward and presenting a bristling appearance, whence the
        [Webster 1913 Suppl.]
     6. (Mil.) a defensive obstacle having pointed barbs extending
        outward, such as one composed of crossed logs with barbed
        wire wound around them, or a tangle of steel beams
        embedded in concrete used to impede or damage landing
        craft on a beach; also, a position well-fortified with
        such defensive obstacles.
     Hedgehog caterpillar (Zool.), the hairy larv[ae] of several
        species of bombycid moths, as of the Isabella moth. It
        curls up like a hedgehog when disturbed. See Woolly
        bear, and Isabella moth.
     Hedgehog fish (Zool.), any spinose plectognath fish, esp.
        of the genus Diodon; the porcupine fish.
     Hedgehog grass (Bot.), a grass with spiny involucres,
        growing on sandy shores; burgrass ({Cenchrus
     Hedgehog rat (Zool.), one of several West Indian rodents,
        allied to the porcupines, but with ratlike tails, and few
        quills, or only stiff bristles. The hedgehog rats belong
        to Capromys, Plagiodon, and allied genera.
     Hedgehog shell (Zool.), any spinose, marine, univalve shell
        of the genus Murex.
     Hedgehog thistle (Bot.), a plant of the Cactus family,
        globular in form, and covered with spines
     Sea hedgehog. See Diodon.
        [1913 Webster]

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