The Collaborative International Dictionary
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.]
(Zo["o]l.) 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.
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.]
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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] 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. Bamboo rat (Zo["o]l.), any Indian rodent of the genus Rhizomys. Beaver rat, Coast rat. (Zo["o]l.) See under Beaver and Coast. Blind rat (Zo["o]l.), the mole rat. Cotton rat (Zo["o]l.), 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 (Zo["o]l.), the potoroo. Norway rat (Zo["o]l.), the common brown rat. See Rat. Pouched rat. (Zo["o]l.)
See Pocket Gopher, under Pocket.
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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. (Zo["o]l.) 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 (Zo["o]l.), a large colubrine snake ( Ptyas mucosus) very common in India and Ceylon. It enters dwellings, and destroys rats, chickens, etc.
Spiny rat (Zo["o]l.), any South American rodent of the genus Echinomys.
To smell a rat. See under Smell.
Wood rat (Zo["o]l.), any American rat of the genus Neotoma, especially Neotoma Floridana, common in the Southern United States. Its feet and belly are white.
Usage examples of "norway rat".
His hair was about the color of a Norway rat and parted just above his left ear.
It was a lot thinner than a Norway rat's and while he tried to swoop it up and over, it didn't make it very well, and a lot of pale scalp showed through.
Third floor, one bedroom with a small kitchen and a garden patio scarcely big enough for a Norway rat.
This projection was not solid, but was a hollow cylinder plugged with a soft woody substance unknown to our region--that is, it had been so plugged, but unfortunately this obstruction had been heedlessly removed by Norway Rat, Chief of the Sappers and Miners, before our arrival.
The conditions rarely changed, but that was the manager's problem, not his--although Hoke hadn't considered the Norway rat invasion as one of his reporting duties when he had agreed to take on the unpaid security position at the hotel.
Back on Nantucket, where the largest wild quadruped was the Norway rat, there were no deer or even rabbits to hunt.
That was the summer that the rat was king, and desperate measures were required to eliminate a pest some said were our native California wood rat, denizen of hill and salt marsh, and not the chunky, bristly Norway rat at all.
She screamed piercingly as a blackish-brown Norway rat tumbled out almost into her face.