| 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) |
| oncotomay | <surgery> The opening of an abscess, or the removal of a tumour, with a cutting instrument. Alternative forms: onkotomy. Origin: Gr. Bulk, mass + to cut: cf. F. Oncotomie. Source: Websters Dictionary (01 Mar 1998) |
| oncotomy | 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 enzyme reverse transcriptase. (18 Nov 1997) |
| 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 action: anti-anxiety agents, antiemetics, antipsychotic agents, serotonin antagonists. Chemical name: 4H-Carbazol-4-one, 1,2,3,9-tetrahydro-9-methyl-3-((2-methyl-1H-imidazol-1-yl)methyl)- (12 Dec 1998) |
| onde | Hatred; fury; envy. Origin: AS. Anda malice, anger; akin to Icel. Andi, ond, breath. Source: Websters Dictionary (01 Mar 1998) |
| 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 | 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 in purine formation). (05 Mar 2000) |
| 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) |