Synonym: betray, betrayer, blabber, blackleg, bum, crumb, denounce, dirty dog, fink, git, give away, grass, informer, lowlife, puke, rotter, scab, scum bag, shit, shop, skunk, snitch, so-and-so, squealer, stag, stinker, stinkpot, strikebreaker, tell on. Similar words: rate, ratio, rating, or rather, operate, scratch, gratify, operator. Meaning: [ræt] 
n. 1. any of various long-tailed rodents similar to but larger than a mouse 2. someone who works (or provides workers) during a strike 3. a person who is deemed to be despicable or contemptible 4. one who reveals confidential information in return for money 5. a pad (usually made of hair) worn as part of a woman's coiffure. v. 1. desert one's party or group of friends, for example, for one's personal advantage 2. employ scabs or strike breakers in 3. take the place of work of someone on strike 4. give (hair) the appearance of being fuller by using a rat 5. catch rats, especially with dogs 6. give away information about somebody.
n. 1. any of various long-tailed rodents similar to but larger than a mouse 2. someone who works (or provides workers) during a strike 3. a person who is deemed to be despicable or contemptible 4. one who reveals confidential information in return for money 5. a pad (usually made of hair) worn as part of a woman's coiffure. v. 1. desert one's party or group of friends, for example, for one's personal advantage 2. employ scabs or strike breakers in 3. take the place of work of someone on strike 4. give (hair) the appearance of being fuller by using a rat 5. catch rats, especially with dogs 6. give away information about somebody. 
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151. Furthermore, recent studies from this laboratory have shown that experimental ethanol administration increases the fragility of rat pancreatic lysosomes.
152. The single amino acid change from the rat sequence is indicated in the parenthesis.
153. Retirement: It's nice to get out of the rat race, but you have to learn to get along with less cheese. Gene Perret 
154. Just himself and Eloise, a cleaver, a gun, a spoonful of rat poison.
155. She was delighted that I was not hurt, and threw the dead rat out of the window.
156. We have recently shown in rat pancreas that adverse effects include pancreatic toxicity.
157. In agreement with our findings, they showed that the rat intestine secreted fluid on day 5 after parasite administration.
158. On their own, owls can not cure the rat problem, but they can help with control.
159. This study was designed to investigate further the relationship between inflammation and fluid transport in the small intestine of the rat.
160. Children are forced into the rat race for higher salary and prestige.
161. Angry spouses and lovers or feuding family members may rat on their loved ones.
162. Spidery legs, rat eyes, whiffling whiskers: an unearthed hedgehog, part of the general exodus due to building developments nearby.
163. In this study the efficacy of adsorbents as antiendotoxin agents in a hapten induced rat model of colitis is investigated.
164. Those damn dirges are still running around my brain, like a tone-deaf rat with a megaphone is trapped inside my head.
165. I walked up and down on the bed, to control my trembling legs, and looked at the dead rat.
166. A small lump of nothing rolled across the floor, gathering substance, and coalesced into an unnoticed rat.
167. Offered a free bed and nosebag, Tony is there like a rat up a drainpipe.
168. The level of platelet activating factor in the rat gastric mucosa was determined after the administration of endothelin-1 using a radioimmunoassay method.
169. Red Death shot from your feet, fouling the air with its stench of rotting meat and rat feces.
170. Old Mosse saved three people from a burning house in the Blitz but was a thieving rat otherwise.
171. Comparison between the protein sequences of Drosophila and rat ribosomal protein S2.
172. When he died in June from cancer, investigators from Liquidators Cork Gulley were called in and soon smelt a rat.
173. These genes have been described previously in mouse, rat, man, Drosophila and birds.
174. The rat does not immediately adjust its daily rhythm to the melatonin.
175. He walks along a narrow path to a ridge where wild boar, hyenas and the golden mole rat occasionally roam.
176. Invitro ras and p53 mutants cooperate to transform primary rat cells into cells capable of lethal tumourigenesis.
177. The area covered by gross injury was expressed as a percentage of the area of the glandular mucosa of the rat stomach.
178. At first I jumped like a kid without hamstrings who had ingested rat poison for breakfast.
179. There was a dead rat, blown almost in two[sentencedict.com], resting on the hearth of the fire.
180. Now I know what it feels like to be a lab rat.
More similar words: rate, ratio, rating, or rather, operate, scratch, gratify, operator, moderate, accurate, desperate, cooperate, tolerate, decorate, at any rate, operating, rather than, operation, generate, strategy, Democrat, migration, integrate, frustrate, narrative, elaborate, corporate, strategic, cooperative, incorporate.