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rodent
ro·dent R0282100 (rōd′nt)n. Any of various mammals of the order Rodentia, such as a mouse, rat, squirrel, or beaver, characterized by large incisors used for gnawing or nibbling.
[From New Latin Rōdentia, order name, from Latin rōdēns, rōdent-, present participle of rōdere, to gnaw; see rēd- in Indo-European roots.]
ro′dent adj.rodent (ˈrəʊdənt) n1. (Animals) a. any of the relatively small placental mammals that constitute the order Rodentia, having constantly growing incisor teeth specialized for gnawing. The group includes porcupines, rats, mice, squirrels, marmots, etcb. (as modifier): rodent characteristics. 2. (Zoology) a. any of the relatively small placental mammals that constitute the order Rodentia, having constantly growing incisor teeth specialized for gnawing. The group includes porcupines, rats, mice, squirrels, marmots, etcb. (as modifier): rodent characteristics. [C19: from Latin rōdere to gnaw, corrode] ˈrodent-ˌlike adjro•dent (ˈroʊd nt)
adj. 1. belonging or pertaining to the gnawing or nibbling mammals of the order Rodentia, characterized by four continually growing incisors: includes mice, squirrels, beavers, chipmunks, and rats. n. 2. a rodent mammal. [1825–35; < New Latin Rodentia, neuter pl. of Latin rōdēns, s. rōdent-, present participle of rōdēre to gnaw] ro·dent (rōd′nt) Any of various very numerous, mostly small mammals having large front teeth used for gnawing. The teeth grow throughout the animal's life, and gnawing keeps them from getting too long. Rodents make up about half the living species of mammals, and include rats, mice, beavers, squirrels, shrews, and hamsters.Thesaurus| Noun | 1. |  rodent - relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawinggnawereutherian, eutherian mammal, placental, placental mammal - mammals having a placenta; all mammals except monotremes and marsupialsorder Rodentia, Rodentia - small gnawing animals: porcupines; rats; mice; squirrels; marmots; beavers; gophers; voles; hamsters; guinea pigs; agoutismouse - any of numerous small rodents typically resembling diminutive rats having pointed snouts and small ears on elongated bodies with slender usually hairless tailsrat - any of various long-tailed rodents similar to but larger than a mousemurine - a rodent that is a member of the family Muridaewater rat - any of various amphibious ratsNew World mouse - a variety of rodentmusquash, Ondatra zibethica, muskrat - beaver-like aquatic rodent of North America with dark glossy brown furFlorida water rat, Neofiber alleni, round-tailed muskrat - of Florida wetlandscotton rat, Sigmodon hispidus - destructive long-haired burrowing rat of southern North America and Central Americawood rat, wood-rat - any of various small short-tailed rodents of the northern hemisphere having soft fur grey above and white below with furred tails and large ears; some are hosts for Ixodes pacificus and Ixodes scapularis (Lyme disease ticks)hamster - short-tailed Old World burrowing rodent with large cheek pouchesgerbil, gerbille - small Old World burrowing desert rodent with long soft pale fur and hind legs adapted for leapinglemming - any of various short-tailed furry-footed rodents of circumpolar distributionhedgehog, porcupine - relatively large rodents with sharp erectile bristles mingled with the furjumping mouse - any of several primitive mouselike rodents with long hind legs and no cheek pouches; of woodlands of Eurasia and North Americajerboa - mouselike jumping rodentdormouse - small furry-tailed squirrel-like Old World rodent that becomes torpid in cold weathersquirrel - a kind of arboreal rodent having a long bushy tailprairie dog, prairie marmot - any of several rodents of North American prairies living in large complex burrows having a barking crymarmot - stocky coarse-furred burrowing rodent with a short bushy tail found throughout the northern hemisphere; hibernates in winterbeaver - large semiaquatic rodent with webbed hind feet and a broad flat tail; construct complex dams and underwater lodgesAplodontia rufa, mountain beaver, sewellel - bulky nocturnal burrowing rodent of uplands of the Pacific coast of North America; the most primitive living rodentcavy - short-tailed rough-haired South American rodentDolichotis patagonum, mara - hare-like rodent of the pampas of Argentinacapibara, capybara, Hydrochoerus hydrochaeris - pig-sized tailless South American amphibious rodent with partly webbed feet; largest living rodentagouti, Dasyprocta aguti - agile long-legged rabbit-sized rodent of Central America and South America and the West Indies; valued as foodCuniculus paca, paca - large burrowing rodent of South America and Central America; highly esteemed as foodmountain paca - rodent of mountains of western South Americacoypu, Myocastor coypus, nutria - aquatic South American rodent resembling a small beaver; bred for its furChinchilla laniger, chinchilla - small rodent with soft pearly grey fur; native to the Andes but bred in captivity for furmountain chinchilla, mountain viscacha - a rodent native to the mountains of Chile and Peru and now bred in captivitychinchillon, Lagostomus maximus, viscacha - gregarious burrowing rodent larger than the chinchillasabrocome, chinchilla rat, rat chinchilla - ratlike rodent with soft fur and large ears of the Andesmole rat - furry short-limbed tailless rodent resembling a true mole in habits and appearance; of eastern Europe and Middle Eastmole rat - African rodent resembling a mole in habits and appearancesand rat - small nearly naked African mole rat of desert areas |
rodentRodents acouchi or acouchy, agouti, beaver, black rat, brown rat or Norway rat, cane rat, capybara, cavy, chinchilla, chipmunk, coypu or nutria, deer mouse, desert rat, dormouse, fieldmouse, flying squirrel, fox squirrel, gerbil, gerbille, or jerbil, gopher or pocket gopher, gopher or ground squirrel, grey squirrel, groundhog or woodchuck, ground squirrel or gopher, guinea pig or cavy, hamster, harvest mouse, hedgehog, house mouse, jerboa, jumping mouse, kangaroo rat, lemming, Maori rat, mara, marmot, mole rat, mouse, muskrat or musquash, paca, pack rat, pocket mouse, porcupine, rat, red squirrel or chickaree, springhaas, squirrel, suslik or souslik, taguan, tucotuco, viscacha or vizcacha, vole, water rat, water vole or water rat, white-footed mouse, white ratTranslationsrodent (ˈrəudənt) noun any of a number of types of animal with large front teeth for gnawing, eg squirrels, beavers, rats etc. 嚙齒動物(兔、鼠等) 啮齿动物（兔、鼠等）
rodent
rodent, member of the mammalian order Rodentia, characterized by front teeth adapted for gnawing and cheek teeth adapted for chewing. The Rodentia is by far the largest mammalian order; nearly half of all mammal species are rodents. They are worldwide in distribution and are found in almost every terrestrial and freshwater habitat, from the shores of the Arctic Ocean to the hottest deserts. They are variously adapted for running, jumping, climbing, burrowing, swimming, and gliding. Many of them have dexterous forepaws, which they use as hands while sitting on their haunches in a position characteristic of many rodents. The great majority are under a few inches in length; the largest, the capybaracapybara
, mammal of Central and much of South America. It is the largest living member of the order Rodentia (the rodents) reaching a length of 4 ft (120 cm) and a weight of 75 to 100 lb (34–45 kg).
..... Click the link for more information. , is about 4 ft (120 cm) long and 20 in. (50 cm) high at the shoulder. Characteristics of Rodents Rodents have enlarged, chisel-shaped upper and lower front incisors that grow throughout their lives. These have hard enamel on the front surface and soft dentine on the back surface, so that unequal wear keeps the chisel edge sharp. There is a gap between the front teeth and the cheek teeth. When the lower jaw is in a forward position, for gnawing, the upper and lower incisors are in contact but the upper and lower cheek teeth are not; thus, wear on the cheek teeth is avoided. The cheeks are drawn in behind the incisors when the animal is gnawing, so that bits of hard material cannot be swallowed. When the lower jaw is pulled back into the chewing position, only the cheek teeth make contact. Types of Rodents The approximately 4,000 rodent species are divided on the basis of their anatomy into three well-defined groups, or suborders, and more than 30 families. The Sciuromorpha, or squirrellike rodents, include the various species of squirrelsquirrel,
name for small or medium-sized rodents of the family Sciuridae, found throughout the world except in Australia, Madagascar, and the polar regions; it is applied especially to the tree-living species.
..... Click the link for more information. , chipmunkchipmunk,
rodent of the family Sciuridae (squirrel family). The chipmunk of the E United States and SE Canada is of the genus Tamias. The body of the common Eastern chipmunk, Tamias striatus, is about 5 to 6 in.
..... Click the link for more information. , marmotmarmot,
ground-living rodent of the genus Marmota, of the squirrel family, closely related to the ground squirrel, prairie dog, and chipmunk. Marmots are found in Eurasia and North America; the best-known North American marmot is the woodchuck, M.
..... Click the link for more information. , woodchuckwoodchuck
or groundhog,
common name of a North American species of marmot, Marmota monax. This large rodent is found in open woods and ravines throughout most of Canada and the NE United States. Its heavyset body is about 2 ft (60 cm) long, excluding the 6 in.
..... Click the link for more information. (or ground hog), prairie dogprairie dog,
short-tailed, ground-living rodent, genus Cynomys, of the squirrel family, closely related to the ground squirrels, chipmunks, and marmots. There are several species, found in the W United States and N Mexico.
..... Click the link for more information. , gophergopher
or pocket gopher,
name for the burrowing rodents of the family Geomyidae, found in North America and Central America. The gopher is gray, buff, or dark brown. Its combined head and body length is 5 to 12 in.
..... Click the link for more information. (or pocket gopher), pocket mousepocket mouse,
small jumping rodent of W North America and as far south as N South America. More closely related to the squirrel than the true mouse, the pocket mouse gets its name from the fur-lined cheek pouches in which it carries its food. It varies in length from 3 to 12 in.
..... Click the link for more information. , kangaroo ratkangaroo rat,
small, jumping desert rodent, genus Dipodomys, related to the pocket mouse. There are about 20 kangaroo rat species, found throughout the arid regions of Mexico and the S and W United States.
..... Click the link for more information. , and beaverbeaver,
either of two large aquatic rodents, Castor fiber and Castor canadensis, known for their engineering feats. They were once widespread in N and central Eurasia except E Siberia, and in North America from the arctic tree line to the S United States.
..... Click the link for more information. . The Myomorpha, or mouselike rodents, include a great variety of mousemouse,
name applied to numerous species of small rodents, often having soft gray or brown fur, long hairless tails, and large ears. The chief distinction between these animals and the variety of rodents called rats is in size: mice are usually smaller.
..... Click the link for more information. and ratrat,
name applied to various stout-bodied rodents, usually having a pointed muzzle, long slender tail, and dexterous forepaws. It refers particularly to the two species of house rat, Rattus norvegicus, the brown, or Norway, rat and R.
..... Click the link for more information. species, as well as species of hamsterhamster,
Old World rodent, related to the voles, lemmings, and New World mice. There are many hamster species, classified in several genera. All are solitary, burrowing, nocturnal animals, with chunky bodies, short tails, soft, thick fur, and large external cheek pouches used
..... Click the link for more information. , lemminglemming,
name for several species of mouselike rodents related to the voles. All live in arctic or northern regions, inhabiting tundra or open meadows. They frequently nest in underground burrows, particularly in winter, although they do not hibernate.
..... Click the link for more information. , volevole,
name for a large number of mouselike rodents, related to the lemmings. Most range in length from 3 1-2 to 7 in. (9–18 cm) and have rounded bodies with gray or brown coats, blunt muzzles, small ears concealed in the long fur, and short tails.
..... Click the link for more information. , muskratmuskrat,
North American aquatic rodent. The common muskrats, species of the genus Ondatra, are sometimes called by their Native American name, musquash. They are found in marshes, quiet streams, and ponds through most of North America N of Mexico, but are absent from the
..... Click the link for more information. , gerbilgerbil
, small desert rodent found throughout the hot arid regions of Africa and Asia. Also known as sand rats, gerbils have large eyes and powerful, elongated hind limbs upon which they can spring. Gerbils are 3 to 5 in. (7.6–12.
..... Click the link for more information. , dormousedormouse,
name for Old World nocturnal rodents of the family Gliridae. There are many dormouse species, classified in several genera. Many resemble small squirrels. Dormice sleep deeply during the day, and European species hibernate for nearly six months of the year; their name
..... Click the link for more information. , and jerboajerboa
, name for the small, jumping rodents of the family Dipodidae, found in arid parts of Asia, N Africa, and SE Europe. Jerboas have extremely long hind feet and short forelegs; they always walk upright or hop like kangaroos.
..... Click the link for more information. . This is the largest rodent group. The Hystricomorpha, or porcupinelike rodents, include the porcupineporcupine,
member of either of two rodent families, characterized by having some of its hairs modified as bristles, spines, or quills. The quills are loosely attached to the porcupines' skin and pull out easily, remaining imbedded in any predator that comes in contact with them.
..... Click the link for more information. , capybara, nutrianutria
or coypu
, aquatic rodent, Myocastor coypus, of South America, introduced in the S United States for its fur, which is similar to that of beaver but not as thick or durable. The nutria resembles a small beaver with a ratlike tail. It is up to 25 in.
..... Click the link for more information. (or coypu), agoutiagouti
, name applied to rabbit-sized rodents of the genus Dasyprocta, found in Central and South America and in the West Indies. They have slender limbs with five front and three hind toes, rudimentary tails, and coarse rough hair that varies from reddish to dark brown
..... Click the link for more information. , cavycavy
, name for 14 species of South American rodents of the family Caviidae, including the domestic guinea pig. The wild cavies are usually small, rounded, and tailless, with fur of a uniform shade of brown.
..... Click the link for more information. (including the domestic guinea pigguinea pig
, domesticated form of the cavy, Cavia porcellus, a South American rodent. It is unrelated to the pig; the name may refer to its shrill squeal. Guinea pigs were raised by the Incas and have long been used as food in South America.
..... Click the link for more information. ), mara, and chinchillachinchilla
, small burrowing rodent of South America. It lives in colonies at high altitudes (up to 15,000 ft/4,270 m) in the Andes of Bolivia, Chile, and Peru. One of the costliest of all furs, its soft gray pelt has been valued since the days of the Inca.
..... Click the link for more information. , as well as many species whose common names include the term rat (e.g., the South American bush rat). Rabbits and hares were once classified as rodents because of their large, chisel-shaped incisors. However, they are quite distinct anatomically and have a long, separate evolutionary history; they are now classified in an order of their own, the Lagomorpha. Using DNA analyses as evidence, some scientists believe that the some other groups of rodents have descended from different ancestors and should thus be placed in orders of their own. See also mountain beavermountain beaver,
stout, short-limbed North American rodent, Aplodontia rufa, not closely related to the true beaver. Also called sewellel beaver after the Chinook word for a robe made from its pelts, it is among the most primitive of the rodents and the only living member
..... Click the link for more information. , ground squirrelground squirrel,
name applied to certain terrestrial rodents of the squirrel family. In North America the name refers to members of the genus Citellus and sometimes to the closely related genera Tamias (chipmunk), Cynomys (prairie dog), and Marmota
..... Click the link for more information. , flying squirrelflying squirrel,
name for certain nocturnal tree squirrels adapted for gliding; they do not actually fly. Most are found in Asia, but one species of the genus Pteromys extends into SE Europe and the two species of Glaucomys are found in North America.
..... Click the link for more information. , pack ratpack rat,
rodent of the genus Neotoma, of North and Central America, noted for its habit of collecting bright, shiny objects and leaving other objects, such as nuts or pebbles, in their place; also called trade rat or wood rat.
..... Click the link for more information. , bandicoot ratbandicoot rat,
giant rat of southern Asia, unrelated to true bandicoots. It is an agricultural pest in the grain crops and gardens of India and Sri Lanka and is known for the piglike grunts it emits when attacked.
..... Click the link for more information. , and jumping mousejumping mouse,
rodent slightly larger than the common mouse, found in North America and N Asia, also called the kangaroo mouse. Its long hind legs and tail enable it to leap distances up to 12 ft (3.7 m). Jumping mice have gray to brown fur and are white underneath.
..... Click the link for more information. . Bibliography See Sir J. R. Ellerman, The Families and Genera of Living Rodents (2 vol., 1940, repr. 1965); B. S. Vindgradov and A. I. Argiropulo, Key to Rodents (tr. 1968). What does it mean when you dream about a rodent?Gophers, rats, mice, and the like are a constant source of irritation and often spread disease, thus requiring extermination. Rodents in a dream may represent issues that are pestering the dreamer and perhaps confounding the dreamer as to how to dispose of them. (See also Mouse, Rat). rodent[′rōd·ənt] (vertebrate zoology) The common name for members of the order Rodentia. rodenta. any of the relatively small placental mammals that constitute the order Rodentia, having constantly growing incisor teeth specialized for gnawing. The group includes porcupines, rats, mice, squirrels, marmots, etc. b. (as modifier): rodent characteristics rodent
rodent (rōd′nt)n. Any of various mammals of the order Rodentia, such as a mouse, rat, squirrel, or beaver, characterized by large incisors used for gnawing or nibbling.
ro′dent adj.rodent Infectious disease A mammal of order Rodentia–eg, mice, rats, squirrels, gerbils, chipmunks, voles, moles, et al Vectors for Argentine hemorrhagic fever, Bolivian hemorrhagic fever, endemic typhus, Francisella tularensis, Hantavirus pulmonary syndrome, Helicobacter cinaedi, hemorrhagic fever with renal syndrome, Hymenolepsis diminuta, Hymenolepsis nana, Lassa fever, leptospirosis, listeriosis, lymphocytic choriomeningitis, Ornithonyssus bacoti-induced dermatitis, plague, rabies, rickettsialpox, salmonellosis, Spirillum minus, Streptobacillus moniliformis, tick-borne relapsing fever, Trichophyton mentagrophytes, Venezuelan hemorrhagic fever, Yersinia enterocoliticarodent any member of the mammalian order Rodentia, including gnawing mammals which have chisel-like incisors and lack canines. Examples include rats, mice, squirrels.rodent
Synonyms for rodentnoun relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawingSynonymsRelated Words- eutherian
- eutherian mammal
- placental
- placental mammal
- order Rodentia
- Rodentia
- mouse
- rat
- murine
- water rat
- New World mouse
- musquash
- Ondatra zibethica
- muskrat
- Florida water rat
- Neofiber alleni
- round-tailed muskrat
- cotton rat
- Sigmodon hispidus
- wood rat
- wood-rat
- hamster
- gerbil
- gerbille
- lemming
- hedgehog
- porcupine
- jumping mouse
- jerboa
- dormouse
- squirrel
- prairie dog
- prairie marmot
- marmot
- beaver
- Aplodontia rufa
- mountain beaver
- sewellel
- cavy
- Dolichotis patagonum
- mara
- capibara
- capybara
- Hydrochoerus hydrochaeris
- agouti
- Dasyprocta aguti
- Cuniculus paca
- paca
- mountain paca
- coypu
- Myocastor coypus
- nutria
- Chinchilla laniger
- chinchilla
- mountain chinchilla
- mountain viscacha
- chinchillon
- Lagostomus maximus
- viscacha
- abrocome
- chinchilla rat
- rat chinchilla
- mole rat
- sand rat
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