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pack rat
pack 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. Most common in the southern and western parts of the United States,... Read more |
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kangaroo rat
kangaroo 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. Kangaroo rats have large, mouselike heads with big eyes, external fur-lined cheek pouches... Read more |
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Rats
rat 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. rattus, the black, roof, or Alexandrine, rat. Both species... Read more |
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rat
rat 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. rattus, the black, roof, or Alexandrine, rat. Both species... Read more |
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Rat-bite fever
Rat-bite fever Definition Rat-bite fever refers to an infection which develops in a person after being bitten or scratched by an infected animal. Description Rat-bite fever occurs most often among laboratory workers who handle lab rats in their jobs, and among people who live in... Read more |
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Octodontids
Octodontidae (bush rats, hedge rats, degus; order Rodentia, suborder Hystricomorpha) A family of rat-like, ground-dwelling or burrowing rodents in which the tail is haired, the hairs growing longer closer to the tip and ending in a tuft. The limbs are short, the fore limb having five digits and the... Read more |
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Behavior modification
Behavior modification A treatment approach, based on the principles of operant conditioning, that replaces undesirable behaviors with more desirable ones through positive or negative reinforcement. Behavior modification is based on the principles of operant conditioning , which were developed... Read more |
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wildcat
wildcat common name of Old World cats ( Felis sylvestris ) of Europe, Asia, and Africa. The wildcat resembles a large domestic tabby cat with a heavy tail; its fur is brownish to gray, with a pattern of light stripes. It can and does interbreed with domestic cats. The five subspecies are the... Read more |
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transgenic
transgenic Describing an organism whose genome incorporates and expresses genes from another species. Transgenic individuals are created by genetic engineering, using suitable vectors to insert the desired foreign gene into the fertilized egg or early embryo of the host. For example, the gene for... Read more |
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armchair
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