| FR | failure rate; film-screen radiograph; fasciculus retroflexus; febrile reaction; feedback regulation;... |
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| OR | a logical binary relation that is true if any argument is true, and false otherwise; [o]estrogen rec... |
| ORE | oil retention enema |
| RC | an electronic circuit containing a resistor and capacitor in series; radiocarpal; reaction center; r... |
| REEDS | retention of tears, ectrodactyly, ectodermal dysplasia, and strange hair, skin and teeth [syndrome] |
| sweat pore | The surface opening of the duct of a sweat gland. Synonym: porus sudoriferus, porus, pore, skin pore. (05 Mar 2000) |
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| sweat test | <investigation> A test used to diagnose cystic fibrosis. Two metal electrodes are placed on the skin of an arm or leg. Very low voltage electricity is used (only a tingling is felt) to measure the concentration of sodium and chloride in the sweat. (19 Jan 1998) |
| duct of sweat glands | The superficial portion of the sweat gland that passes through the corium and epidermis, opening on the surface by the porus sudoriferus or sweat pore. Synonym: ductus sudoriferus, sudoriferous duct, sweat duct. (05 Mar 2000) |
| inotophoretic sweat test | <investigation> A test used to diagnose cystic fibrosis. Two metal electrodes are placed on the skin of an arm or leg. Very low voltage electricity is used (only a tingling is felt) to measure the concentration of sodium and chloride in the sweat. (27 Sep 1997) |
| partial denture retention | The fixation of a removable partial denture by the use of clasps, indirect retainers, or precision attachments. (05 Mar 2000) |
| retention | 1. The persistent keeping within the body of matters normally excreted. 2. In cavity preparation, the prevention of displacement of a restoration. 3. <dentistry> The period during which the patient is wearing an appliance to maintain and stabilise the teeth in the position into which they were moved. 4. <psychology> The persistence to perform a learned behaviour (facts or experiences) after an interval has elapsed in which there has been no performance or practice of the behaviour. Origin: L. Retentio, from retentare = to hold firmly back (18 Nov 1997) |
| retention area | An area of a tooth provided during its preparation for restoration that will aid in holding the restoration in place. See: retention groove, retention point. (05 Mar 2000) |
| retention arm | A flexible segment of a removable partial denture that engages an undercut on an abutment and is designed to retain the denture. (05 Mar 2000) |
| retention cyst | A cyst resulting from some obstruction to the excretory duct of a gland. Synonym: distention cyst, secretory cyst. (05 Mar 2000) |
| retention form | The shape of a cavity preparation that prevents displacement of the dental restoration by lateral or tipping forces as well as masticatory forces. (05 Mar 2000) |
| retention groove | One of the groove's forming opposing vertical constrictions in a tooth to aid in retention of a dental restoration. (05 Mar 2000) |
| retention jaundice | Jaundice due to insufficiency of liver function or to an excess of bile pigment production; the bilirubin is unconjugated because it has not passed through the liver cells; van den Bergh test is indirect. (05 Mar 2000) |
| retention point | A provision made within a cavity preparation of a tooth to hold in place the first pieces of gold when placing a direct gold restoration. (05 Mar 2000) |
| retention polyp | A smoothly rounded mucosal hamartoma of the large bowel, which may be multiple and cause rectal bleeding, especially in the first decade of life; it is not precancerous. Synonym: retention polyp. (05 Mar 2000) |
| retention suture | <surgery> A heavy reinforcing suture placed deep within the muscles and fasciae of the abdominal wall to relieve tension on the primary suture line and thus obviate postoperative wound disruption. Synonym: tension suture. (05 Mar 2000) |