| OPH, Oph | ophthalmology; ophthalmoscopy, ophthalmoscope |
|---|---|
| DAT | delayed-action tablet; dementia Alzheimer's type; dental aptitude test; diacetylthiamine; diet as to... |
| DC | daily census; data communication; data conversion; decrease; deep compartment; Dental Corps; deoxych... |
| DASD | Direct Access Storage Device = RAM |
| DC | 1) Direct Current 2) Diffusion Capacity |
| SLO | Scanning Laser Ophthalmoscope |
|---|---|
| DAT | DIRECT AGGLUTINATION TEST |
| D | Direct |
| DAT | Direct Antiglobulin Test |
| DC | Direct Current |
| direct ophthalmoscope | <instrument> An instrument designed to visualise the interior of the eye, with the instrument relatively close to the subject's eye and the observer viewing an upright magnified image. (05 Mar 2000) |
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| binocular ophthalmoscope | <instrument> An ophthalmoscope that provides a stereoscopic view of the fundus. (05 Mar 2000) |
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| demonstration ophthalmoscope | <instrument> An ophthalmoscope by which the fundus may be seen simultaneously by more than one observer. (05 Mar 2000) |
| indirect ophthalmoscope | <instrument> An instrument designed to visualise the interior of the eye, with the instrument at arm's length from the subject's eye and the observer viewing an inverted image through a convex lens located between the instrument and the subject's eye. (05 Mar 2000) |
| ophthalmoscope | <instrument, ophthalmology> An instrument for viewing the interior of the eye, particularly the retina. Light is thrown into the eye by a mirror (usually concave) and the interior is then examined with or without the aid of a lens. Ophthalmoscop"ic. Origin: From Gr. The eye + -scope. Source: Websters Dictionary (01 Mar 1998) |
| non-direct transmission | <epidemiology> A mode of transmission that differs in some mysterious way from indirect transmission. (05 Dec 1998) |
| direct | 1. Straight, in a straight line. 2. Performed immediately and without the intervention of subsidiary means. Origin: L. Directus (18 Nov 1997) |
| direct acrylic restoration | A direct resin restoration of autopolymerizing acrylic. (05 Mar 2000) |
| direct agglutination | A general term for techniques which use the agglutination (macroscopic clumping) of particulate reagents as an indicator of the presence of an antigen-antibody reaction. Examples (haemagglutination, latex agglutination and coagglutination) follow. (05 Mar 2000) |
| direct B-cell | Lymphocytes responding to a small range of antigens by antibody production without any requirement for T-cells. The antigens include flagellin and pokeweed mitogen. (18 Nov 1997) |
| direct bilirubin | Conjugated bilirubin = Direct bilirubin. Bilirubin that has been chemically attached to a glucuronide in the liver. The bilirubin that is excreted into the bile by the liver and stored in the gallbladder or transferred to the duodenum. Normal direct bilirubin is 0 to 0.3 mg/dl. Greater than normal values can be seen in bile duct obstruction, cirrhosis, Crigler-Najjar syndrome, Dubin-Johnson syndrome and hepatitis. (27 Sep 1997) |
| direct bone impression | An impression of denuded bone, used in the construction of subperiosteal denture implants. (05 Mar 2000) |
| direct composite resin restoration | A direct restoration made by inserting a plastic mix of auto or light-polymerised resins in a cavity prepared in a tooth. Synonym: direct composite resin restoration. (05 Mar 2000) |
| direct contamination | <dentistry> Direct contact with impurities or germs. (for example by a patient sneezing on the assistant.) (08 Jan 1998) |
| direct Coombs' test | A test for detecting sensitised erythrocytes in erythroblastosis foetalis and in cases of acquired immune haemolytic anaemia: the patient's erythrocytes are washed with saline to remove serum and unattached antibody protein, then incubated with Coombs' anti-human globulin (usually serum from a rabbit or goat previously immunised with human globulin); after incubation, the system is centrifuged and examined for agglutination, which indicates the presence of so-called incomplete or univalent antibodies on the surface of the erythrocytes. (05 Mar 2000) |
| direct current | (DC) Electric current which travels continuously in the same direction over a sustained period of time, contrast with AC (Alternating Current) which oscillates as a function of time. (09 Oct 1997) |
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