| OROS | oral osmotic |
|---|---|
| ORT | object relations technique; operating room technician; oral rehydration therapy |
| OS | left eye [Lat. oculus sinister]; occipitosacral; occupational safety; office surgery; Omenn syndrome... |
| OSCC | oral squamous cell carcinoma |
| OTD | oculotrichodysplasia; oral temperature device; organ tolerance dose |
| vitamin F | Term sometimes applied to the essential unsaturated fatty acids, linoleic, linolenic, and arachidonic acids. (05 Mar 2000) |
|---|---|
| vitamin G | An obsolete term for riboflavin. (05 Mar 2000) |
| vitamin H | <biochemistry> A prosthetic group for carboxylase enzymes. Important in fatty acid biosynthesis and catabolism and has found widespread use as a covalent label for macromolecules which may then be detected by high affinity binding of labelled avidin or streptavidin. Essential growth factor for many cells. (18 Nov 1997) |
| vitamin K | <biochemistry> A fat soluble vitamin that plays an important role in blood clotting. (27 Sep 1997) |
| vitamin K1 | Vitamin K1 or K1(20); 2-methyl-3-phytyl-1,4-naphthoquinone; 3-phytylmenaquinone; isolated from alfalfa;also prepared synthetically; major form of vitamin K found in plants. Synonym: phytomenadione, phytonadione, vitamin K1, vitamin K1(20). (05 Mar 2000) |
| vitamin K2 | Hexaprenylmenaquinone; prenylmenaquinone-6; 2-methyl-3-hexaprenyl-1,4-naphthoquinone;isolated from putrified fish meal; potency is about 60% of that of phylloquinone (vitamin K1). Synonym: farnoquinone, vitamin K2, vitamin K2(30). (05 Mar 2000) |
| vitamin K2(35) | Menaquinone-6 with a 3-heptaprenyl side chain. Synonym: vitamin K2(35). (05 Mar 2000) |
| vitamin K3 | A fat soluble vitamin that plays an important role in blood clotting. (27 Sep 1997) |
| vitamin K4 | 2-Methyl-1,4-naphthohydroquinone diacetate;menadiol acetylated at both OH groups; a prothrombogenic vitamin. Synonym: acetomenaphthone, vitamin K4. (05 Mar 2000) |
| vitamin K5 | 4-amino-2-methyl-1-naphthol;an antihemorrhagic vitamin. (05 Mar 2000) |
| vitamin k deficiency | A nutritional condition produced by a deficiency of vitamin k in the diet, characterised by an increased tendency to haemorrhage (haemorrhagic diathesis). Such bleeding episodes may be particularly severe in newborn infants. (12 Dec 1998) |
| vitamin K epoxidase | <enzyme> Reductase is the reverse reaction of the epoxidase Registry number: EC 1.14.99.- Synonym: vitamin k epoxide reductase, menadione epoxide reductase, vitamin k 2,3-epoxide reductase, phylloquinone epoxide reductase, vitamin ko reductase (26 Jun 1999) |
| vitamin K unit | See: Dam unit. (05 Mar 2000) |
| vitamin P | A mixture of bioflavonoids extracted from plants (especially citrus fruits). It reduces the permeability and fragility of capillaries and is useful in the treatment of certain cases of purpura that are resistant to vitamin C therapy. See: hesperidin, quercetin, rutin. Synonym: capillary permeability factor, citrin, permeability vitamin. (05 Mar 2000) |
| vitamin PP | A precursor of NAD, that is a product of the oxidation of nicotine. (18 Nov 1997) |