| piracetam | <chemical> A compound suggested to be both a nootropic and a neuroprotective agent. Its efficacy and mechanisms of action are not clear. Pharmacological action: neuroprotective agents, nootropic agents. Chemical name: 1-Pyrrolidineacetamide, 2-oxo- (12 Dec 1998) |
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| pirai | <zoology> Same as Piraya. Source: Websters Dictionary (01 Mar 1998) |
| pirarucu | <zoology> Same as Arapaima. Origin: From the native South American name. Source: Websters Dictionary (01 Mar 1998) |
| pirate | 1. A robber on the high seas; one who by open violence takes the property of another on the high seas; especially, one who makes it his business to cruise for robbery or plunder; a freebooter on the seas; also, one who steals in a harbor. 2. An armed ship or vessel which sails without a legal commission, for the purpose of plundering other vessels on the high seas. 3. One who infringes the law of copyright, or publishes the work of an author without permission. <zoology> Pirate perch, a fresh water percoid fish of the United States (Aphredoderus Sayanus). It is of a dark olive colour, speckled with blackish spots. Origin: L. Pirata, Gr, fr. To attempt, undertake, from making attempts or attacks on ships, an attempt, trial; akin to E. Peril: cf. F. Pirate. See Peril. Source: Websters Dictionary (01 Mar 1998) |
| piraya | <zoology> A large voracious fresh water fish (Serrasalmo piraya) of South America, having lancet-shaped teeth. Origin: From the native name. Source: Websters Dictionary (01 Mar 1998) |
| pirbuterol | A6[(tert-Butylamino)methyl]-3-hydroxy-2,6-pyridine-dimethanol;a selective b2-adrenergic bronchodilator used in the treatment of asthma. (05 Mar 2000) |
| Pirenella | A genus of marine and brackish water operculate (prosobranch) snails. Pirenella conica is the initial intermediate host of Heterophyes heterophyes, the fish-borne fluke of humans and fish-eating birds and mammals along the Mediterranean and Red Sea coasts. (05 Mar 2000) |
| pirenzepine | <chemical> 5,11-dihydro-11-((4-methyl-1-piperazinyl)acetyl)-6h-pyrido(2,3-b)(1,4)benzodiazepin-6-one. An antimuscarinic agent that inhibits gastric secretion at lower doses than are required to affect gastrointestinal motility, salivary, central nervous system, cardiovascular, ocular, and urinary function. It promotes the healing of duodenal ulcers and due to its cytoprotective action is beneficial in the prevention of duodenal ulcer recurrence. It also potentiates the effect of other antiulcer agents such as cimetidine and ranitidine. It is generally well tolerated by patients. Pharmacological action: anti-ulcer agents, muscarinic antagonists, parasympatholytics. Chemical name: 6H-Pyrido(2,3-b)(1,4)benzodiazepin-6-one, 5,11-dihydro-11-((4-methyl-1-piperazinyl)acetyl)- (12 Dec 1998) |
| piretanide | High ceiling loop diuretic similar to bumetanide and furosemide; used as a diuretic in hypertension and congestive heart failure. (05 Mar 2000) |
| piribedil | <chemical> A dopamine d2 agonist. It is used in the treatment of parkinson disease, particularly for alleviation of tremor. It has also been used for circulatory disorders and in other applications as a d2 agonist. Pharmacological action: antiparkinson agents, dopamine agonists. Chemical name: Pyrimidine, 2-(4-(1,3-benzodioxol-5-ylmethyl)-1-piperazinyl)- (12 Dec 1998) |
| pirie | <botany> A pear tree. Alternative forms: pery, pyrie. See: Pear. Source: Websters Dictionary (01 Mar 1998) |
| Pirie's bone | An anomalous bone of the foot located near the head of the talus. Synonym: Pirie's bone. (05 Mar 2000) |
| Pirie, George | <person> Scottish radiologist, 1864-1929. See: Pirie's bone. (05 Mar 2000) |
| piriform | Pear-shaped. Synonym: pyriform. Origin: L. Pirum, pear, + forma, form (05 Mar 2000) |
| piriform area | The olfactory cortex, corresponding to the rostral half of the uncus; receiving its major afferents from the olfactory bulb, it is classified as allocortex. See: cerebral cortex. Synonym: olfactory cortex, piriform area. (05 Mar 2000) |