| nile | The great river of Egypt. Nile bird. <zoology> The Egyptian goose. See Note under Goose. Origin: L. Nilus, gr. Source: Websters Dictionary (01 Mar 1998) |
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| Nile blue A | A basic oxazin dye, C20H20N3OCl, used as a fat and vital stain, and in Kittrich's stain; as an indicator, it changes from blue to purplish red at pH 10 to 11. (05 Mar 2000) |
| nilgau | <zoology> See Nylghau. Source: Websters Dictionary (01 Mar 1998) |
| niloscope | <instrument> A Nilometer. Origin: Gr.; the Nile + to observe. Source: Websters Dictionary (01 Mar 1998) |
| nim1 protein kinase | <enzyme> Dual function protein kinase which autophosphorylates serine and tyrosine residues; acts as positive regulator of mitosis by down-regulating the wee1 protein kinase pathway in yeast; has been sequenced; nim1 is also known as cdr1 Registry number: EC 2.7.1.- Synonym: nim1 gene product, cdr1 gene product (26 Jun 1999) |
| nimble | Origin: OE. Nimel, prob. Orig, quick at seizing, fr. Nimen to take, AS. Niman; akin to D. Nemen, G. Nehmen, OHG. Neman, Icel. Nema, Goth. Nima, and prob. To Gr. To distribute. Light and quick in motion; moving with ease and celerity; lively; swift. "Through the mid seas the nimble pinnace sails." (Pope) Nimble is sometimes used in the formation of self-explaining compounds; as, nimble-footed, nimble-pinioned, nimble-winged, etc. <botany> Nimble Will, a slender, branching, American grass (Muhlenbergia diffusa), of some repute for grazing purposes in the Mississippi valley. Synonym: Agile, quick, active, brisk, lively, prompt. Source: Websters Dictionary (01 Mar 1998) |
| nimbus | Origin: L, a rain storm, a rain cloud, the cloudshaped which enveloped the gods when they appeared on earth. 1. A circle, or disk, or any indication of radiant light around the heads of divinities, saints, and sovereigns, upon medals, pictures, etc.; a halo. See Aureola, and Glory. "The nimbus is of pagan origin." "As an atribute of power, the nimbus is often seen attached to the heads of evil spirits." 2. <astronomy> A rain cloud; one of the four principal varieties of clouds. See Cloud. Source: Websters Dictionary (01 Mar 1998) |
| nimodipine | <chemical> A calcium channel blockader with preferential cerebrovascular activity. It has marked cerebrovascular dilating effects, lowers blood pressure, and is effective in the therapy and/or prevention of cerebral vasospasm caused by stroke, cerebral haemorrhage, aneurysm, severe head injury, or cerebral ischemia. Pharmacological action: antihypertensive agents, calcium channel blockers, vasodilator agents. Chemical name: 3,5-Pyridinedicarboxylic acid, 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-, 2-methoxyethyl 1-methylethyl ester (12 Dec 1998) |
| nimorazole | <chemical> 1-[2-(5-nitroimidazole-1-yl)ethyl]morpholine. An antitrichomonal agent which is effective either topically or orally and whose urinary metabolites are also trichomonicidal. Pharmacological action: antitrichomonal agents. Chemical name: Morpholine, 4-(2-(5-nitro-1H-imidazol-1-yl)ethyl)- (12 Dec 1998) |
| nimustine | <chemical> N'-((4-amino-2-methyl-5-pyrimidinyl)methyl)-n-(2-chloroethyl)-n-nitrosourea. Antineoplastic agent especially effective against malignant brain tumours. The resistance which brain tumour cells acquire to the initial effectiveness of this drug can be partially overcome by the simultaneous use of membrane-modifying agents such as reserpine, calcium antagonists such as nicardipine or verapamil, or the calmodulin inhibitor, trifluoperazine. The drug has also been used in combination with other antineoplastic agent or with radiotherapy for the treatment of various neoplasms. Pharmacological action: antineoplastic agent. Chemical name: Urea, N'-((4-amino-2-methyl-5-pyrimidinyl)methyl)-N-(2-chloroethyl)-N-nitroso- (12 Dec 1998) |
| nine | Eight and one more; one less than ten; as, nine miles. Nine men's morris. See Morris. <geometry> Nine points circle, a circle so related to any given triangle as to pass through the three points in which the perpendiculars from the angles of the triangle upon the opposite sides (or the sides produced) meet the sides. It also passes through the three middle points of the sides of the triangle and through the three middle points of those parts of the perpendiculars that are between their common point of meeting and the angles of the triangle. The circle is hence called the nine points or six points circle. Origin: OE. Nine, nihen, AS. Nigon, nigan; akin to D. & LG. Negen, OS. & OFries. Nigun, OHG. Niun, G. Neun, Icel. Niu, sw. Nio, Dan. Ni, Goth. Niun, Ir. & Gael. Naoi, W. Naw, L. Novem, gr, Skr. Navan; of unknown origin. 307. Cf. Novembeer. Source: Websters Dictionary (01 Mar 1998) |
| nine mile fever | <infectious disease> An acute (abrupt-onset), self-limited febrile illness first reported in 1935 in Queensland, Australia. The Q is said not to be for Queensland, but for query since the cause of the disease was long a query (question mark). It is caused by the bacterium Coxiella burnetii, a rickettsia which mainly afflicts sheep and cattle but can be transmitted to humans who have contact with infected animals. Symptoms resemble those of influenza and include sudden onset of fever, headache, malaise, and pneumonia (interstitial pneumonitis) but no rash. (12 Dec 1998) |
| nine-bark | <botany> A white-flowered rosaceous shrub (Neillia, or Spiraea, opulifolia), common in the Northern United States. The bark separates into many thin layers, whence the name. Source: Websters Dictionary (01 Mar 1998) |
| nine-eyes | <zoology> The lamprey. Source: Websters Dictionary (01 Mar 1998) |
| nine-killer | <zoology> The northern butcher bird. Origin: So called because it is believed to kill and impale on thorns nine birds, etc, in succession. Source: Websters Dictionary (01 Mar 1998) |