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

omphalophlebitis
Inflammation of the umbilical veins. ... Origin: omphalo-+ G. Phleps, vein, + -itis, inflammation ... (05 Mar 2000) ...

omphalorrhagia
Bleeding from the umbilicus. ... Origin: omphalo-+ G. Rhegnymi, to burst forth ... (05 Mar 2000) ...

omphalorrhexis
Rupture of the umbilical cord during childbirth. ... Origin: omphalo-+ G. Rhexis, rupture ... (05 Mar 2000) ...

omphalorrhoea
A serous discharge from the umbilicus. ... Origin: omphalo-+ G. Rhoia, flow ... (05 Mar 2000) ...

omphalosite
Underdeveloped twin of allantoidangiopagous twin; joined by umbilical vessels. ... Synonym: placental parasitic twin. ... Origin: omphalo-+ G. Sitos, food ... (05 Mar 2000) ...

omphalospinous
Denoting a line connecting the umbilicus and the anterior superior spine of the ilium, on which lies McBurney's point. ... (05 Mar 2000) ...

omphalotripsy
Crushing, instead of cutting, the umbilical cord after childbirth. ... Origin: omphalo-+ G. Tripsis, a rubbing ... (05 Mar 2000) ...

omphalovesical
Synonym for vesicoumbilical ... <anatomy, urology> Relating to the urinary bladder and the umbilicus. ... Synonym: omphalovesical. ... (05 Mar 2000) ...

omphalus
Rarely used term for umbilicus. ... Origin: G. Omphalos, navel ... (05 Mar 2000) ...

OMS
Organisation Mondiale de la Sant'. The World health organisation (who). ... (12 Dec 1998) ...

Omsk haemorrhagic fever
A form of epidemic haemorrhagic fever found in central Russia, caused by the Omsk haemorrhagic fever virus, a member of the family Flaviviridae, and transmitted by Dermacentor ticks; associated with gastrointestinal symptoms and haemorrhages but little or no central nervous system involvement. ... (05 Mar 2000) ...

Omsk haemorrhagic fever virus
A virus of the genus Flavivirus causing Omsk haemorrhagic fever. ... (05 Mar 2000) ...

on
The general signification of on is situation, motion, or condition with respect to contact or support beneath; as: ... 1. at, or in contact with, the surface or upper part of a thing, and supported by it; placed or lying in contact with the surface; as, the book lies on the table, which stands on the floor of a house on an island. 'I stood on the br …

on-off phenomenon
A state in the treatment of Parkinson's disease by l-dopa, in which there is a rapid fluctuation of akinetic (off) and choreoathetotic (on) movements. ... (05 Mar 2000) ...

onagrarieous
<botany> Pertaining to, or resembling, a natural order of plants (Onagraceae or Onagrarieae), which includes the fuchsia, the willow-herb (Epilobium), and the evening primrose (oenothera). ... Origin: From NL. Onagra an old scientific name of the evening primrose (Enothera), fr. Gr. A kind of plant; of uncertain origin. ... Source: Websters Dic …

once
1. By limitation to the number one; for one time; not twice nor any number of times more than one. 'Ye shall . . . Go round about the city once.' (Josh. Vi. 3) 'Trees that bear mast are fruitful but once in two years.' (Bacon) ... 2. at some one period of time; used indefinitely. 'My soul had once some foolish fondness for thee.' (Addison) 'That cou …

oncho-
See: onco-. ... (05 Mar 2000) ...

onchocerca
A genus of parasitic nematodes whose organisms live and breed in skin and subcutaneous tissues. Onchocercal microfilariae may also be found in the urine, blood, or sputum. ... (12 Dec 1998) ...

Onchocerca cervicalis
A species common in the ligamentum nuchae of horses, mules, and asses, where it has been suspected of playing a role in fistulous withers and poll evil. ... (05 Mar 2000) ...

Onchocerca gibsoni
A species that infects the subcutaneous tissues of cattle, buffalo, and sheep. ... (05 Mar 2000) ...

Onchocerca lienalis
A species that inhabits the connective tissue around the ligamentum nuchae, tibiofemoral ligament, spleen capsule, and other sites in cattle and buffalo; although widely distributed, it is not common in the U.S. ... (05 Mar 2000) ...

onchocerca volvulus
A species of parasitic nematodes widely distributed throughout central africa and also found in northern south america, southern mexico, and guatemala. Its intermediate host and vector is the blackfly or buffalo gnat. ... (12 Dec 1998) ...

onchocerciasis
Infection with nematodes of the genus onchocerca. Characteristics include the presence of firm subcutaneous nodules filled with adult worms, pruritus, and ocular lesions. ... (12 Dec 1998) ...

onchocerciasis, ocular
Filarial infection of the eyes transmitted from person to person by bites of onchocerca volvulus-infected black flies. The microfilariae of onchocerca are thus deposited beneath the skin. They migrate through various tissues including the eye. Those persons infected have impaired vision and up to 20% are blind. The incidence of eye lesions has been …

onchocercid
Common name for members of the family Onchocercidae. ... (05 Mar 2000) ...

Onchocercidae
A family of nematode parasites (superfamily Filarioidea) characterised by production of microfilariae; it includes the genera Onchocerca, Wuchereria, Brugia, Loa, and Mansonella. ... (05 Mar 2000) ...

onchocercosis
Synonym for onchocerciasis ... Infection with nematodes of the genus onchocerca. Characteristics include the presence of firm subcutaneous nodules filled with adult worms, pruritus, and ocular lesions. ... (12 Dec 1998) ...

onco
<prefix> Prefix meaning tumour or the process of cancer formation. ... Origin: G. Onkos, bulk, mass ... (21 Jun 2000) ...

Oncocerca
Synonym for onchocerca ... A genus of parasitic nematodes whose organisms live and breed in skin and subcutaneous tissues. Onchocercal microfilariae may also be found in the urine, blood, or sputum. ... (12 Dec 1998) ...

oncocyte
Askenazy cell ...

oncocytic hepatocellular tumour
Synonym for fibrolamellar liver cell carcinoma ... <tumour> Primary hepatic carcinoma in which malignant hepatocytes are intersected by fibrous lamellated bands. ... Synonym: oncocytic hepatocellular tumour. ... (05 Mar 2000) ...

oncocytoma
<tumour> A glandular tumour composed of large cells with cytoplasm that is granular and eosinophilic due to the presence of abundant mitochondria; occurs uncommonly in the kidney, salivary glands, and endocrine glands. ... Synonym: oxyphil adenoma. ... Origin: onco-+ G. Kytos, cell, + -oma, tumour ... (05 Mar 2000) ...

oncofetal
Relating to tumour-associated substances present in foetal tissue, as oncofetal antigens. ... (05 Mar 2000) ...

oncofetal antigens
Tumour-associated antigen's present in foetal tissue but not in normal adult tissue, including alpha-fetoprotein and carcinoembryonic antigen. ... (05 Mar 2000) ...

oncofetal marker
A tumour marker produced by tumour tissue and by foetal tissue of the same type as the tumour, but not by normal adult tissue from which the tumour arises. ... (05 Mar 2000) ...

oncogen
<oncology, pharmacology> Synonym for carcinogen, an agent causing cancer. ... (18 Nov 1997) ...

oncogene
<molecular biology, oncology> Mutated and/or overexpressed version of a normal gene of animal cells (the proto-oncogene) that in a dominant fashion can release the cell from normal restraints on growth and thus alone or in concert with other changes, convert a cell into a tumour cell. ... (18 Nov 1997) ...

oncogene protein gp140(v-fms)
Transforming glycoprotein coded by the fms oncogene from the susan mcdonough strain of feline sarcoma virus (sm-fesv). The oncogene protein v-fms lacks sequences, which, in the highly homologous proto-oncogene protein c-fms (csf-1 receptor), normally serve to regulate its tyrosine kinase activity. The missing sequences in v-fms mimic the effect of …

oncogene protein p21(ras)
Transforming protein encoded by ras oncogenes. Point mutations in the cellular ras gene (c-ras) can also result in a mutant p21 protein that can transform mammalian cells. Oncogene protein p21(ras) has been directly implicated in human neoplasms, perhaps accounting for as much as 15-20% of all human tumours. ... (12 Dec 1998) ...

oncogene protein p55(v-myc)
Transforming protein coded by myc oncogenes. The v-myc protein has been found in several replication-defective avian retrovirus isolates which induce a broad spectrum of malignancies. ... (12 Dec 1998) ...

oncogene protein p65(gag-jun)
Transforming protein coded by jun oncogenes (genes, jun). This is a gag-onc fusion protein of about 65 kD derived from avian sarcoma virus. V-jun lacks a negative regulatory domain that regulates transcription in c-jun. ... (12 Dec 1998) ...

oncogene protein pp60(v-src)
<chemical> Tyrosine-specific protein kinase encoded by the v-src oncogene of rous sarcoma virus. The transforming activity of pp60(v-src) depends on both the lack of a critical carboxy-terminal tyrosine phosphorylation site at position 527, and the attachment of pp60(v-src) to the plasma membrane which is accomplished by myristylation of its …

oncogene proteins
Proteins coded by oncogenes. They include proteins resulting from the fusion of an oncogene and another gene (oncogene proteins, fusion). ... (12 Dec 1998) ...

oncogene proteins v-abl
Transforming proteins encoded by the abl oncogenes. Oncogenic transformation of c-abl to v-abl occurs by insertional activation that results in deletions of specific n-terminal amino acids. ... (12 Dec 1998) ...

oncogene proteins v-erba
Transforming proteins encoded by erba oncogenes from the avian erythroblastosis virus. They are truncated versions of c-erba, the thyroid hormone receptor (receptors, thyroid hormone) that have retained both the DNA-binding and hormone-binding domains. Mutations in the hormone-binding domains abolish the transcriptional activation function. V-erba …

oncogene proteins v-erbb
Transforming proteins encoded by erbb oncogenes from the avian erythroblastosis virus. The protein is a truncated form of the egf receptor (receptors, epidermal growth factor-urogastrone) whose kinase domain is constitutively activated by deletion of the ligand-binding domain. ... (12 Dec 1998) ...

oncogene proteins v-fos
Transforming proteins coded by fos oncogenes. These proteins have been found in the finkel-biskis-jinkins (fbj-msv) and finkel-biskis-reilly (fbr-msv) murine sarcoma viruses which induce osteogenic sarcomas in mice. The fbj-msv v-fos gene encodes a p55 kD protein and the fbr-msv v-fos gene encodes a p75 kD fusion protein. ... (12 Dec 1998) ...

oncogene proteins v-mos
Transforming proteins coded by mos oncogenes. The v-mos proteins were originally isolated from the moloney murine sarcoma virus (mo-msv). ... (12 Dec 1998) ...

oncogene proteins, fusion
The translation products of the fusion between an oncogene and another gene. The latter may be of viral or cellular origin. ... (12 Dec 1998) ...

oncogene proteins, viral
Products of viral oncogenes, most commonly retroviral oncogenes. They usually have transforming and often protein kinase activities. ... (12 Dec 1998) ...

oncogenes
Genes which can potentially induce neoplastic transformation. They include genes for growth factors, growth factor receptors, protein kinases, signal transducers, nuclear phosphoproteins, and transcription factors. When these genes are constitutively expressed after structural and/or regulatory changes, uncontrolled cell proliferation may result. V …

oncogenesis
<oncology> The causation or production of tumours. ... (16 Dec 1997) ...

oncogenic
Synonym for oncogenous ... Causing, inducing, or being suitable for the formation and development of a neoplasm. ... Synonym: oncogenic. ... (05 Mar 2000) ...

oncogenic virus
<oncology, virology> A virus capable of causing cancer in animals or in humans. These include DNA viruses, ranging in size from Papova viruses to Herpes viruses and the RNA containing retroviruses. ... See: Oncovirinae. ... (18 Nov 1997) ...

oncogenic viruses
Viruses that produce tumours. ... (12 Dec 1998) ...

oncogenous
Causing, inducing, or being suitable for the formation and development of a neoplasm. ... Synonym: oncogenic. ... (05 Mar 2000) ...

oncography
Graphic representation, by means of a special apparatus, of the size and configuration of an organ. ... (05 Mar 2000) ...

oncoides
Intumescence or turgescence. ... Origin: onco-+ G. Eidos, resemblance ... (05 Mar 2000) ...

oncologic nursing
Nursing care provided cancer patients. It includes aspects of family functioning through education of both patient and family. The specialty of oncologic nursing focuses on cancer as a major health care problem. ... (12 Dec 1998) ...

oncologist
<specialist> A doctor who specialises in the diagnosis, treatment and rehabilitation of individuals suffering with cancer. ... (16 Dec 1997) ...

oncology
<study> The study of diseases that cause cancer. ... (12 May 1997) ...

oncology service, hospital
The hospital department responsible for the administration and provision of diagnostic and therapeutic services for the cancer patient. ... (12 Dec 1998) ...

oncolysis
Destruction of a neoplasm; sometimes used with reference to the reduction of any swelling or mass. ... Origin: onco-+ G. Lysis, dissolution ... (05 Mar 2000) ...

oncolytic
<oncology, pathology> Pertaining to, characterised by or causing oncolysis which is the destruction of tumour cells. ... Origin: Gr. Lysis = dissolution ... (18 Nov 1997) ...

Oncomelania
A medically important genus of amphibious freshwater operculate snails of the family Hydrobiidae (subfamily Hydrobiinae; subclass Prosobranchiata). In the Orient, several subspecies of Oncomelania hupensis serve as intermediate hosts of the oriental blood fluke, Schistosoma japonicum. ... Origin: onco-+ G. Melas (melan-), black ... (05 Mar 2000) ...

oncometric
Relating to oncometry. ... (05 Mar 2000) ...

oncometry
Measurement of the size of an organ. ... (05 Mar 2000) ...

oncomodulin
<molecular biology> Calcium-binding proteins containing the EF hand motif. Found only in tumours and related to panalbumin. ... (18 Nov 1997) ...

oncomouse
<oncology> Term for a transgenic mouse that has had a foreign oncogene placed into its genome to facilitate the study of the cancer disease process. ... (14 Nov 1997) ...

oncoplastic carcinoma
<tumour> Obsolete term for an undifferentiated carcinoma showing no evidence by light microscopy of origin from a specific epithelial tissue, e.g., squamous or glandular epithelium. ... (05 Mar 2000) ...

oncorhynchus
A genus of the family salmonidae (salmons and trouts). They are named for their hooked (onco) nose (rhynchus). They are usually anadromous and occasionally inhabit freshwater. They can be found in north pacific coastal areas from japan to california and adjacent parts of the arctic ocean. Salmon and trout are popular game and food fish. Various spe …

oncorhynchus keta
An anadromous species of salmon found in the streams of the pacific coast from sacramento north, and also common in japan. It is used frequently in genetic and other medical research. It is called dog salmon and chum salmon, the latter name possibly from chinook jargon for spots or writing, with reference to its body markings. ... (12 Dec 1998) ...

oncorhynchus kisutch
An anadromous species of salmon ranging from the arctic and pacific oceans to monterey bay, california and inhabiting ocean and coastal streams. It is familiarly known as the coho or silver salmon. It is relatively small but its light-coloured flesh is of good flavor. ... (12 Dec 1998) ...

oncorhynchus mykiss
A large stout-bodied, sometimes anadromous, trout found in still and flowing waters of the pacific coast from southern california to alaska. It has a greenish back, a whitish belly, and pink, red, or lavender stripes on the sides, with usually a sprinkling of black dots. It is highly regarded as a sport and food fish. Its former name was salmo gair …

oncornaviruses
Synonym for Oncovirinae ... The family of retroviruses (Retroviridae) that can cause tumours. They are enveloped by membrane derived from the plasma membrane of the host cell, from which they are released by budding without lysing the cell. Within each virion is a pair of single stranded RNA molecules. Replication involves a DNA intermediate made on …

oncosis
A condition characterised by the formation of one or more neoplasms or tumours. ... Origin: G. Onkosis, swelling, fr. Onkos, bulk, mass ... (05 Mar 2000) ...

oncosphere
Synonym: hexacanth. ... Origin: onco-+ G. Sphaira, sphere ... (05 Mar 2000) ...

oncosphere embryo
Synonym for hexacanth embryo ... The embryo of tapeworms of the subclass Cestoda, such as Taenia saginata, characterised by three pairs of hooks used for penetration through the gut of an intermediate host. ... Synonym: oncosphere embryo. ... (05 Mar 2000) ...

oncostatin M
<growth factor> Multifunctional cytokine (28 kD) with structural and functional similarities to IL-6 and LIF (part of the GM-CSF family of cytokines). Produced by activated T-cells, inhibits tumour cell growth and induces IL-6 production by endothelial cells via the tyrosine kinase p62yes. ... (18 Nov 1997) ...

oncotherapy
Treatment of tumours. ... (05 Mar 2000) ...

oncotic
Pertaining to, caused by or marked by swelling. ... (18 Nov 1997) ...

oncotic pressure
Osmotic pressure exerted by colloids in solution. ... (05 Mar 2000) ...

oncotomy
<procedure> Rarely used term for incision of an abscess, cyst, or other tumour. ... Origin: onco-+ G. Tome, incision ... (05 Mar 2000) ...

oncotropic
Manifesting a special affinity for neoplasms or neoplastic cells. ... Synonym: tumouraffin. ... Origin: onco-+ G. Trope, a turning ... (05 Mar 2000) ...

Oncovirinae
The family of retroviruses (Retroviridae) that can cause tumours. They are enveloped by membrane derived from the plasma membrane of the host cell, from which they are released by budding without lysing the cell. Within each virion is a pair of single stranded RNA molecules. Replication involves a DNA intermediate made on an RNA template by the enz …

oncovirus
Any virus of the subfamily Oncovirinae. ... See: oncogenic virus. ... (05 Mar 2000) ...

ondansetron
<chemical> 1,2,3,9-tetrahydro-9-methyl-3-((2-methyl-1h-imidazol-1-yl)methyl)-4h-carbazol-4-one. A competitive serotonin type 3 receptor antagonist. It is effective in the treatment of nausea and vomiting caused by cytotoxic chemotherapy drugs, including cisplatin, and it has reported anxiolytic and neuroleptic properties. ... Pharmacological a …

Ondine
German mythological character. ... (05 Mar 2000) ...

Ondine's curse
Idiopathic central alveolar hypoventilation in which involuntary control of respiration is depressed, but voluntary control of ventilation is not impaired. ... Origin: Ondine, char. In play by J. Giraudoux, based on Undine, Ger. Myth. Char. ... (05 Mar 2000) ...

Ondiri disease
Synonym for bovine petechial fever ... A disease of cattle in Kenya caused by the rickettsia Ehrlichia ondiri and characterised by haemorrhage and oedema. ... Synonym: Ondiri disease. ... (05 Mar 2000) ...

one-carbon fragment
The formyl group or the methyl group that takes part in transformylation or transmethylation reactions; by means of these reactions, a group containing a single carbon atom is added to a compound being biosynthesised, adding a methyl group (as in thymidine formation), adding a hydroxymethyl group (as in serine biosynthesis), or closing a ring (as i …

one-carbon group transferases
<enzyme> A subclass of transferases that transfer chemical groups containing a single carbon. These include the methyltransferases, the hydroxymethyl and formyl transferases, the carboxyl and carbamoyl transferases, and the amidinotransferases. ... Registry number: EC 2.1 ... (12 Dec 1998) ...

one-hand
Employing one hand; as, the one-hand alphabet. ... See: dactylology. ... (04 Mar 1998) ...

one-horned uterus
An obsolete term for unicorn uterus. ... (05 Mar 2000) ...

one-step procedure
A procedure in which a surgical biopsy is performed under general anesthesia and if cancer is found, a mastectomy or lumpectomy is done immediately as part of the same operation. ... (09 Oct 1997) ...

oneiric
1. Pertaining to dreams. ... 2. Pertaining to the clinical state of oneirophrenia. ... Synonym: oniric. ... Origin: G. Oneiros, dream ... (05 Mar 2000) ...

oneirism
A waking dream state. ... Origin: G. Oneiros, dream ... (05 Mar 2000) ...

oneirocritical
Rarely used term pertaining to the logic of dreams. ... Origin: G. Oneiros, dream, + kritikos, skilled in judgment ... (05 Mar 2000) ...

oneirodynia
Rarely used term for an unpleasant or painful dream. ... Origin: G. Oneiros, dream, + odyne, pain ... (05 Mar 2000) ...

oneirodynia activa
Synonym for somnambulism ... <psychiatry, neurology> Sleepwalking, rising out of bed and walking about during an apparent state of sleep, usually occurring in the first third of the night and lasting a few minutes to a half hour. ... Origin: L. Somnus = sleep, ambulare = to walk ... (18 Nov 1997) ...