| NOS | <enzyme> An enzyme that catalyses the conversion of l-arginine, NADPH, and oxygen to citrulline, nitric oxide, and NADP+. The enzyme found in brain, but not that induced in lung or liver by endotoxin, requires calcium.There are two isoforms, one constitutive and one activated by calmodulin. Chemical name: L-Arginine,NADPH:oxygen oxidoreductase (nitric-oxide-forming) Registry number: EC 1.14.13.39 Acronym: NOS (12 Dec 1998) |
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| noscapine | <chemical> A naturally occurring opium alkaloid that is a centrally acting antitussive agent. Pharmacological action: antitussive agents. Chemical name: 1(3H)-Isobenzofuranone, 6,7-dimethoxy-3-(5,6,7,8-tetrahydro-4-methoxy-6-methyl-1,3-dioxolo(4,5-g)isoquinolin-5-yl)-, (S-(R*,S*))- (12 Dec 1998) |
| nose | 1. <anatomy> The prominent part of the face or anterior extremity of the head containing the nostrils and olfactory cavities; the olfactory organ. See Nostril, and Olfactory organ under Olfactory. 2. The power of smelling; hence, scent. "We are not offended with a dog for a better nose than his master." (Collier) 3. A projecting end or beak at the front of an object; a snout; a nozzle; a spout; as, the nose of a bellows; the nose of a teakettle. Nose bit, a thin, broad, membranous fold of skin on the nose of many species of bats. It varies greatly in size and form. Nose of wax, fig, a person who is pliant and easily influenced. "A nose of wax to be turned every way." Nose piece, the nozzle of a pipe, hose, bellows, etc.; the end piece of a microscope body, to which an objective is attached. To hold, put, or bring one's nose to the grindstone. See Grindstone. To lead by the nose, to lead at pleasure, or to cause to follow submissively; to lead blindly, as a person leads a beast. To put one's nose out of joint, to humiliate one's pride, especially. By supplanting one in the affections of another. To thrust one's nose into, to meddle officiously in. To wipe one's nose of, to deprive of; to rob. Origin: AS. Nosu; akin to D. Neus, G. Nase, OHG. Nasa, Icel. Nos, Sw. Nasa, Dan. Nase, Lith. Nosis, Russ. Nos', L. Nasus, nares, Skr. Nasa, nas. Cf. Nasal, Nasturtium, Naze, Nostril, Nozzle. Source: Websters Dictionary (01 Mar 1998) |
| nose deformities, acquired | Deformities of the nose acquired after birth from injury or disease. (12 Dec 1998) |
| nose diseases | Disorders of the nose, general or unspecified. (12 Dec 1998) |
| nose drops | A liquid preparation intended for intranasal administration with a medicine dropper. Most frequently used for decongestion of the nasal passages but can be used for any other appropriate indication. (05 Mar 2000) |
| nose job | Plastic surgery on the nose known medically as a rhinoplasty. (12 Dec 1998) |
| nose swab | <investigation, microbiology> A sample of nasopharyngeal secretions are obtained via a swab stick (Q-tip-like) and sent to the lab for bacterial or viral culture. This test is used to identify an organism or virus which is responsible for respiratory disease and can also guide the selection of an effective antibiotic agent. (13 Nov 1997) |
| nose, runny | Rhinorrhoea is the medical term for this common problem. From the greek words rhinos meaning of the nose and rhoia meaning a flowing. (12 Dec 1998) |
| nose-bridge-lid reflex | Contraction of the orbicularis oculi muscles upon tapping the margin of the orbit, or the bridge or tip of the nose. Synonym: nose-bridge-lid reflex, nose-eye reflex. (05 Mar 2000) |
| nose-eye reflex | Contraction of the orbicularis oculi muscles upon tapping the margin of the orbit, or the bridge or tip of the nose. Synonym: nose-bridge-lid reflex, nose-eye reflex. (05 Mar 2000) |
| nosebleed | 1. A bleeding at the nose. 2. <botany> The yarrow. See Yarrow. Source: Websters Dictionary (01 Mar 1998) |
| nosebleed, causes of | The nose is a part of the body that is very rich in blood vessels (vascular) and is situated in a vulnerable position on the face. As a result, any trauma to the face can cause bleeding which may be profuse. Nosebleeds can occur spontaneously when the nasal membranes dry out, crust, and crack, as is common in dry climates, or during the winter months when the air is dry and warm from household heaters. People are more susceptible if they are taking medications which prevent normal blood clotting (coumadin, warfarin, aspirin, or any anti-inflammatory medication). Other predisposing factors include infection, trauma, allergic and non-allergic rhinitis, hypertension., alcohol abuse and inherited bleeding problems. (12 Dec 1998) |
| nosebleed, treatment of | To stop a nosebleed, you should: 1. Pinch all the soft parts of the nose together between your thumb and index finger. 2. Press firmly toward the face - compressing the pinched parts of the nose against the bones of the face. 3. Hold the nose for at least 5 minutes (timed by the clock). Repeat as necessary until the nose has stopped bleeding. 4. Sit quietly, keeping the head higher than the level of the heart; that is, sit up or lie with the head elevated. Do not lay flat or put your head between your legs. 5. Apply ice (crushed in a plastic bag or washcloth) to nose and cheeks. (12 Dec 1998) |
| nosel | To nurse; to lead or teach; to foster; to nuzzle. "If any man use the Scripture . . . To nosel thee in anything save in Christ, he is a false prophet." (Tyndale) See: Noursle. Source: Websters Dictionary (01 Mar 1998) |