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mondofacto - Online Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 26/01/2008, UK Words: 116197

notanencephalia
Absence of the cerebellum. ... Origin: G. Notos, back, + an-priv. + enkephalos, brain ... (05 Mar 2000) ...

notatin
A protein (glucose oxidase) that has specifically been isolated from Penicillium notatum. ... Origin: from Penicillium notatum ... (05 Mar 2000) ...

notation
1. The act or practice of recording anything by marks, figures, or characters. ... 2. Any particular system of characters, symbols, or abbreviated expressions used in art or science, to express briefly technical facts, quantities, etc. Esp, the system of figures, letters, and signs used in arithmetic and algebra to express number, quantity, or opera …

Notch
<molecular biology> A neurogenic gene of Drosophila. The normal function of Notch is required in ectodermal cells to prevent the cells from differentiating as neuroblasts. Gene product contains 36 repeats of the EGF like domain. ... (13 Nov 1997) ...

notch for round ligament of liver
The notch in the inferior border of the liver that accommodates the round ligament. ... Synonym: incisura ligamenti teretis hepatis, incisura umbilicalis, umbilical notch. ... (05 Mar 2000) ...

notch of apex of heart
A slight notch near the apex of the heart where the anterior interventricular sulcus reaches the diaphragmatic surface of the heart. ... Synonym: incisura apicis cordis. ... (05 Mar 2000) ...

notch of tentorium
Synonym for tentorial notch ... The triangular opening in the tentorium cerebelli through which the brainstem extends from the posterior into the middle cranial fossa. ... Synonym: incisura tentorii, notch of tentorium. ... (05 Mar 2000) ...

notched
Synonym for emarginate ... Having a broad, shallow notch at the top. ... (09 Oct 1997) ...

notched teeth
Synonym for Hutchinson's teeth ... The teeth of congenital syphilis in which the incisal edge is notched and narrower than the cervical area. ... See: Hutchinson's crescentic notch. ... Synonym: notched teeth, screwdriver teeth, syphilitic teeth. ... (05 Mar 2000) ...

note
1. A mark or token by which a thing may be known; a visible sign; a character; a distinctive mark or feature; a characteristic quality. 'Whosoever appertain to the visible body of the church, they have also the notes of external profession.' (Hooker) 'She [the Anglican church] has the note of possession, the note of freedom from party titles,the no …

note blindness
Synonym for musical alexia ... Loss of the ability to read music. ... (27 Sep 1997) ...

notencephalocele
Malformation in the occipital portion of the cranium with protrusion of brain substance. ... Origin: G. Notos, back, + enkephalos, brain, + kele, hernia ... (05 Mar 2000) ...

nothing
1. Not anything; no thing (in the widest sense of the word thing); opposed to anything and something. 'Yet had his aspect nothing of severe.' (Dryden) ... 2. Nonexistence; nonentity; absence of being; nihility; nothingness. ... 3. A thing of no account, value, or note; something irrelevant and impertinent; something of comparative unimportance; utter …

Nothnagel, C W Hermann
<person> Austrian physician, 1841-1905. ... See: Nothnagel's syndrome. ... (05 Mar 2000) ...

notice
1. To observe; to see to mark; to take note of; to heed; to pay attention to. ... 2. To show that one has observed; to take public note of; remark upon; to make comments on; to refer to; as, to notice a book. 'This plant deserves to be noticed in this place.' (Tooke) 'Another circumstance was noticed in connection with the suggestion last discussed. …

notifiable disease
<epidemiology> Diseases, usually of an infectious nature, whose occurrence is required by law to be made known to a health officer or local government authority. ... (05 Dec 1998) ...

notobranchiata
<marine biology> A division of nudibranchiate mollusks having gills upon the back. ... The Dorsibranchiata. ... Origin: NL. See Notum, and Branchia. ... (19 Mar 1998) ...

notochord
<embryology> An axial mesodermal tissue found in embryonic stages of all chordates and protochordates, often regressing as maturity is approached. Typically a rod shaped mass of vacuolated cells. It lies immediately below the nerve cord and may provide mechanical strength to the embryo. ... (13 Nov 1997) ...

notochordal canal
Synonym for archenteric canal ... Invagination of the blastopore into the notochordal process to form a cavity. ... See: neurenteric canal. ... Synonym: notochordal canal. ... (05 Mar 2000) ...

notochordal plate
The sheet of notochordal cells that are intercalated in the endodermal roof of the primitive yolk sac. ... See: head process. ... (05 Mar 2000) ...

notochordal process
In the embryo, a midline column of cells that migrate forward from the primitive node to form the notochord. ... See: head process. ... (05 Mar 2000) ...

notochordal sheath
The fibrous outer covering of the notochord. ... (05 Mar 2000) ...

notochordal vertebrate
A lower vertebrate in which the notochord persists, unossified, in adult life. ... (05 Mar 2000) ...

Notoedres cati
Sarcoptic mange mite of cats. ... (05 Mar 2000) ...

notoedric mange
Mange of cats caused by the mite, Notoedres cati. ... (05 Mar 2000) ...

notophthalmus
A genus of newts of the salamandridae family found in north america in areas east of the 100th meridian. A common species is notophthalmus viridescens. ... (12 Dec 1998) ...

notophthalmus viridescens
A species of newt in the salamandridae family in which the larvae transform into terrestrial eft stage and later into an aquatic adult. They occur from canada to southern united states. Viridescens refers to the greenish colour often found in this species. ... (12 Dec 1998) ...

notoplate
Homotetrameric protein (76 kD) involved, together with three SNAPs, in mediating vesicle traffic between medial and trans Golgi. ... (18 Nov 1997) ...

notornis
<ornithology> A genus of birds allied to the gallinules, but having rudimentary wings and incapable of flight. Notornis Mantelli was first known as a fossil bird of New Zealand, but subsequently a few individuals were found living on the southern island. It is supposed to be now nearly or quite extinct. ... Origin: NL, fr. Gr. The south, or so …

notwithstanding
Without prevention, or obstruction from or by; in spite of. 'We gentil women bee Loth to displease any wight, Notwithstanding our great right.' (Chaucer's Dream) 'Those on whom Christ bestowed miraculous cures were so transported that their gratitude made them, notwithstanding his prohibition, proclaim the wonders he had done.' (Dr. H. More) ... Not …

noumenon
<psychology> The of itself unknown and unknowable rational object, or thing in itself, which is distinguished from the phenomenon through which it is apprehended by the senses, and by which it is interpreted and understood; so used in the philosophy of Kant and his followers. ... Origin: NL. Fr. Gr. The thing perceived, p. Pr. Pass. Of to perc …

nourish
1. To feed and cause to grow; to supply with matter which increases bulk or supplies waste, and promotes health; to furnish with nutriment. 'He planteth an ash, and the rain doth nourish it.' (Is. Xliv. 14) ... 2. To support; to maintain. 'Whiles I in Ireland nourish a mighty band.' (Shak) ... 3. To supply the means of support and increase to; to enc …

nourishment
A substance used to feed or to sustain life and growth of an organism. ... Synonym: aliment. ... (05 Mar 2000) ...

nous
A word originally used by Anaxagoras to mean an all-knowing, all-pervading spirit or force; in later Greek philosophy it came to mean simply mind, reason, or intellect. ... Origin: G. Mind, reason ... (05 Mar 2000) ...

nova scotia
A province of eastern canada, one of the maritime provinces with new brunswick, prince edward island, and sometimes newfoundland. Its capital is halifax. The territory was granted in 1621 by james I to the scotsman sir william alexander and was called nova scotia, the latin for new scotland. The territory had earlier belonged to the french, under t …

novel
Of recent origin or introduction; not ancient; new; hence, out of the ordinary course; unusual; strange; surprising. ... In civil law, the novel or new constitutions are those which are supplemental to the code, and posterior in time to the other books. These contained new decrees of successive emperors. Novel assignment, a new assignment or specifi …

novel human deoxyribonuclease
<enzyme> 45% identical to dnase i. ... Registry number: EC 3.1.- ... Synonym: nhdnase ... (26 Jun 1999) ...

novice
1. One who is new in any business, profession, or calling; one unacquainted or unskilled; one yet in the rudiments; a beginner; a tyro. 'I am young; a novice in the trade.' (Dryden) ... 2. One newly received into the church, or one newly converted to the Christian faith. ... 3. One who enters a religious house, whether of monks or nuns, as a probatio …

novobiocic acid synthetase
<enzyme> Catalyses synthesis of novobiocic acid from 3-amino-4,7-dihydroxy-8-methylcoumarin and 4-hydroxy-3(3-methyl-2-butenyl)benzoic acid ... Registry number: EC 6.3.1.- ... (26 Jun 1999) ...

novobiocin
<chemical> N-(7-((3-o-(aminocarbonyl)-6-deoxy-5-c-methyl-4-o-methyl- beta-l-lyxopyranosyl)oxy)-4-hydroxy-8-methyl-2-oxo-2h-1- benzopyran-3-yl)-4-hydroxy-3-(3-methyl-2-butenyl)benzamide. Antibiotic substance produced by streptomyces spheroides. ... Pharmacological action: antibiotics. ... Chemical name: Benzamide, N-(7-((3-O-(aminocarbonyl)-6-de …

Novy and MacNeal's blood agar
A nutrient agar containing two volumes of defibrinated rabbit's blood; suitable for the cultivation of a number of trypanosomes. ... (05 Mar 2000) ...

Novy, Frederick
<person> U.S. Bacteriologist, 1864-1957. ... See: Novy and MacNeal's blood agar. ... (05 Mar 2000) ...

now
1. at the present time; at this moment; at the time of speaking; instantly; as, I will write now. 'I have a patient now living, at an advanced age, who discharged blood from his lungs thirty years ago.' (Arbuthnot) ... 2. Very lately; not long ago. 'They that but now, for honor and for plate, Made the sea blush with blood, resign their hate.' (Walle …

noxa
Anything that exerts a harmful influence, such as trauma, poison, etc. ... Origin: L. Injury, fr. Noceo, to injure ... (05 Mar 2000) ...

noxae
Agents capable of exerting a harmful effect on the body. ... (12 Dec 1998) ...

noxious
1. Hurtful; harmful; baneful; pernicious; injurious; destructive; unwholesome; insalubrious; as, noxious air, food, or climate; pernicious; corrupting to morals; as, noxious practices or examples. 'Too frequent an appearance in places of public resort is noxious to spiritual promotions.' (Swift) ... 2. Guilty; criminal. 'Those who are noxious in the …

noxythiolin
<chemical> 1-(hydroxymethyl)-3-methyl-2-thiourea. Local antibacterial that probably acts by releasing formaldehyde in aqueous solutions. It is used for irrigation of infected body cavities - bladder, peritoneum, etc. And as a spray for burns. ... Pharmacological action: anti-infective agents, local. ... Chemical name: Thiourea, N-(hydroxymethyl …

Np
1. Symbol for neptunium. ... 2. <abbreviation> Neper. ... (05 Mar 2000) ...

NPH insulin
isophane insulin ...

NPN
<abbreviation> Nonprotein nitrogen. ... (05 Mar 2000) ...

npo
Do not take anything by mouth. ... (16 Dec 1997) ...

Npr protease
<enzyme> Mw 35 kD; from streptomyces cacaoi; the propeptide plays an important role in maturation and secretion of the enzyme ... Registry number: EC 3.4.24.- ... (26 Jun 1999) ...

Nps
<abbreviation> Nitrophenylsulfenyl. ... (05 Mar 2000) ...

NREM
<abbreviation> Non-rapid eye movement. ... (05 Mar 2000) ...

Nrk protein kinase
<enzyme> Regulation is under translational control; involved in trypanosoma brucei differentiation; nrk locus has two homologous genes nrka and nrkb (97% identity); amino acid sequence has been determined ... Registry number: EC 2.7.10.- ... Synonym: nrk protein ... (26 Jun 1999) ...

nRNA
<abbreviation> Nuclear RNA. ... (05 Mar 2000) ...

NS2-3 protease
<enzyme> Cleaves ns2 from ns3 in the hepatitis c virus polyprotein precursor; may be a metalloproteinase or a cysteine proteinase ... Registry number: EC 3.4.22.- ... (26 Jun 1999) ...

NS5A-associated kinase
<enzyme> Involved in the phosphorylation of the hepatitis c virus ns5a nonstructural protein in vitro and in vivo ... Registry number: EC 2.7.10.- ... (26 Jun 1999) ...

NSAID
Synonym for non-steroidal anti-inflammatory ... <pharmacology> A large group of anti-inflammatory agents that work by inhibiting the production of prostaglandins. They exert anti-inflammatory, analgesic and antipyretic actions. ... Examples include: ibuprofen, ketoprofen, piroxicam, naproxen, sulindac, aspirin, choline subsalicylate, diflunisal …

NSAIDS
Synonym for non-steroidal anti-inflammatory ... <pharmacology> A large group of anti-inflammatory agents that work by inhibiting the production of prostaglandins. They exert anti-inflammatory, analgesic and antipyretic actions. ... Examples include: ibuprofen, ketoprofen, piroxicam, naproxen, sulindac, aspirin, choline subsalicylate, diflunisal …

NSF
Synonym for National Science Foundation ... <organisation> A nonregulatory U.S. Federal agency which has oversight of biotechnology research activities that the agency funds. ... (09 Oct 1997) ...

NSILA
Synonym for nonsuppressible insulin-like activity ... A blood protein (nsila) which mimics the biological activity of insulin in serum, but is not suppressed by insulin antibodies. During acid-ethanol extraction of cohn fraction III, 10% of the activity is found in the supernatant (nsila-s) and the remaining activity in the precipitate (nsila-p). Th …

nsP2 proteinase
<enzyme> Papain-like proteinase from sindbis virus with processes polyprotein precursors; cys-481 and his-558 have been identified as the catalytic dyad ... Registry number: EC 3.4.22.- ... Synonym: nonstructural polyprotein 2 proteinase, nsp2 nonstructural proteinase, sindbis virus nsp2 proteinase, nsp2 protein, sindbis virus, nsp2 proteinase, …

NSP4 serine protease
<enzyme> Do not confuse with nsp4 protein ... Registry number: EC 3.4.21.- ... (26 Jun 1999) ...

NTD
Synonym for neural tube defect ... <neurology, paediatrics> Abnormal development during embryonic life of the neural tube producing congenital malformations of the nervous system due to closure failure of the neural tube. ... The structure gives rise to the central nervous system (the brain and spinal cord), and failure to close results in anen …

NTMI
Synonym for nontransmural myocardial infarction ... Necrosis of heart muscle that fails to extend from the endocardium to the epicardium, often erroneously considered relatively benign. ... (05 Mar 2000) ...

NTNG
<abbreviation> Nontoxic nodular goiter. ... (05 Mar 2000) ...

NTP
<abbreviation> Nucleoside 5'-triphosphate. ... (05 Mar 2000) ...

NTS
Synonym for nucleus tractus solitarii ... nucleus of solitary tract ...

nu
1. Thirteenth letter of the Greek alphabet, &nu. ... 2. Symbol for kinematic viscosity; frequency; stoichiometric number. ... 3. In chemistry, denotes the position of a substituent located on the thirteenth atom from the carboxyl or other functional group. ... (05 Mar 2000) ...

nu body
Synonym for nucleosome ... <cell biology> Repeating units of organisation of chromatin fibres in chromosomes, consisting of around 200 base pairs and two molecules each of the histones H2A, H2B, H3 and H4. most of the DNA (around 140 base pairs) is believed to be wound around a core formed by the histones, the remainder joins adjacent nucleoso …

NU-3 protein tyrosine phosphatase
<enzyme> The murine homolog of rat cam tyrosine phosphatase; has an extracellular cell-adhesion-molecule-like domain; mw 211 kD; genbank x82288 ... Registry number: EC 3.1.3.- ... Synonym: nu-3 ptp, ptp nu-3 ... (26 Jun 1999) ...

Nuc
Synonym for nucleoside ... <biochemistry> Purine or pyrimidine base linked glycosidically to ribose or deoxyribose, but lacking the phosphate residues that would make it a nucleotide. ... Ribonucleosides are adenosine, guanosine, cytidine and uridine. Deoxyribosides are deoxyadenosine, deoxyguanosine, deoxycytidine and deoxythymidine (the latte …

nuchal fascia
<anatomy> The fascia that encloses the posterior muscles of the neck. ... Synonym: fascia nuchae. ... (05 Mar 2000) ...

nuchal ligament
Synonym for ligamentum nuchae ... A sagittal ligamentous band at the back of the neck, formed of thickened supraspinous ligaments; it extends from the external occipital protuberance to the posterior border of the foramen magnum, cranially, to the seventh cervical spinous process, caudally. ... Synonym: apparatus ligamentosus colli, nuchal ligament.< …

nuchal plane
<anatomy> The external surface of the squamous part of the occipital bone below the superior nuchal line, giving attachment to the muscles of the back of the neck. ... (05 Mar 2000) ...

nuchal region
Synonym for posterior region of neck ... The back of neck, including the suboccipital region. ... Synonym: regio nuchalis, nuchal region, posterior neck region, regio cervicalis posterior. ... (05 Mar 2000) ...

nuchal rigidity
<neurology> Resistance to flexion of the neck, seen in individuals with meningitis. ... (27 Sep 1997) ...

nuchal tubercle
Synonym for vertebra prominens ... The vertebra in the cervicothoracic region which has the most prominent spinous process (seventh cervical vertebra in 70% of the cases, sixth in 20%, and first thoracic vertebra in 10%). ... Synonym: nuchal tubercle. ... (05 Mar 2000) ...

Nuck, Anton
<person> A Dutch anatomist. ... Lived: 1650-1692. ... See: Nuck's diverticulum, Nuck's hydrocele, canal of Nuck. ... (05 Mar 2000) ...

Nuck's diverticulum
Synonym for processus vaginalis of peritoneum ... A peritoneal diverticulum in the embryonic lower anterior abdominal wall that traverses the inguinal canal; in the male it forms the tunica vaginalis testis and normally loses its connection with the peritoneal cavity; a persistent processus vaginalis in the female is known as the canal of Nuck. ... S …

Nuck's hydrocele
Synonym for hydrocele feminae ... Accumulation of serous fluid in the labium majus or in Nuck's canal. ... Synonym: hydrocele muliebris, Nuck's hydrocele. ... (05 Mar 2000) ...

Nuclear actin binding protein
<molecular biology> Nuclear protein, dimer of 34 kD subunits. Binds actin with Kd of around 25M. ... (18 Nov 1997) ...

nuclear atom
<physics, radiobiology> A concept or model of the atom characterised by the presence of a small, massive nucleus at its centre. ... (05 Mar 2000) ...

nuclear bag
<cell biology> The aggregation of nuclei occurring in the nonstriated centre of an intrafusal muscle fibre of a neuromuscular spindle. ... (05 Mar 2000) ...

nuclear bag fibre
The largest type of intrafusal muscle fibre's in a neuromuscular spindle, containing a central aggregation of nuclei (nuclear bag). ... (05 Mar 2000) ...

nuclear binding energy
<physics> The difference between the total energy (= mc^2) of the bound nucleus, and the energies of the individual constituent particles (= sum of masses c^2). The nuclear binding energy per nucleon is a maximum for iron. Fusion releases energy because light nuclei are less tightly bound than medium-weight nuclei, and thus energy is liberate …

nuclear bone scan
A nuclear medicine test that involves the introduction of a radioactive compound into the blood stream. The radioactive compound acts as a tracer and allows for the imaging of the bony skeleton. ... (27 Sep 1997) ...

nuclear cardiology
<radiology> Myocardial infarct imaging (Tc-99m PYP), myocardial perfusion imaging (Tl-201), blood pool (MUGA), first-pass studies ... (12 Dec 1998) ...

nuclear cataract
A cataract involving the nucleus. ... Synonym: hard cataract. ... (05 Mar 2000) ...

nuclear chain fibre
The shortest and most numerous type of intrafusal muscle fibre's in a neuromuscular spindle, containing a single row of centrally positioned nuclei. ... (05 Mar 2000) ...

nuclear chemistry
The science concerned with the chemistry of nuclear reactions and processes. ... (05 Mar 2000) ...

nuclear energy
Energy released by nuclear fission or nuclear fusion. ... (12 Dec 1998) ...

nuclear envelope
<cell biology> Membrane system that surrounds the nucleus of eukaryotic cells. Consists of inner and outer membranes separated by perinuclear space and perforated by nuclear pores. The term should be used in preference to the term nuclear membrane which is potentially very confusing. ... (18 Nov 1997) ...

nuclear factor 1
See: CTF. ... (18 Nov 1997) ...

nuclear family
A family composed of husband and wife with their children. ... (12 Dec 1998) ...

nuclear fission
Nuclear reaction in which the nucleus of a heavy atom such as uranium or plutonium is split into two approximately equal parts by a neutron, charged particle, or photon. ... (12 Dec 1998) ...

nuclear fusion
Thermonuclear reaction in which the nuclei of an element of low atomic weight unite under extremely high temperature and pressure to form a nucleus of a heavier atom. ... (12 Dec 1998) ...

nuclear heart scan
This noninvasive test uses radioactive tracers to delineate the hearts chambers and major vessels. It may be used to detect a heart attack, heart muscle function and coronary artery disease. The patient receives a radioactive tracer by injection (into a vein) and then the heart is imaged using a gamma camera. The heart is imaged before and after ex …

nuclear hyaloplasm
Synonym for karyolymph ... The presumably fluid substance or gel of the nucleus in which stainable elements were believed to be suspended; much that was formerly considered to be karyolymph is now known to be euchromatin. ... Synonym: nuclear hyaloplasm, nuclear sap, nucleochylema, nucleochyme. ... Origin: karyo-+ L. Lympha, clear water ... (05 Mar 200 …