| receiver operating characteristic | A plot of the sensitivity of a diagnostic test as a function of non-specificity (one minus the specificity). The ROC curve indicates the intrinsic properties of a test's diagnostic performance and can be used to compare the relative merits of competing procedures. (05 Mar 2000) |
|---|---|
| receiver operating characteristic curve | A plot of true positive versus false positive results, usually in a trial of a diagnostic test. A graphical means of assessing the ability of a screening test to discriminate between healthy and diseased persons. Synonym: ROC curve. (05 Mar 2000) |
| receiver | 1. One who takes or receives in any manner. 2. A person appointed, ordinarily by a court, to receive, and hold in trust, money or other property which is the subject of litigation, pending the suit; a person appointed to take charge of the estate and effects of a corporation, and to do other acts necessary to winding up its affairs, in certain cases. 3. One who takes or buys stolen goods from a thief, knowing them to be stolen. 4. <chemistry> A vessel connected with an alembic, a retort, or the like, for receiving and condensing the product of distillation. A vessel for receiving and containing gases. 5. <physics> The glass vessel in which the vacuum is produced, and the objects of experiment are put, in experiments with an air pump. Cf. Bell jar, and 6. <engineering> A vessel for receiving the exhaust steam from the high-pressure cylinder before it enters the low-pressure cylinder, in a compound engine. A capacious vessel for receiving steam from a distant boiler, and supplying it dry to an engine. 7. That portion of a telephonic apparatus, or similar system, at which the message is received and made audible; opposed to transmitter. <physics> Exhausted receiver, a receiver, as that used with the air pump, from which the air has been withdrawn; a vessel the interior of which is a more or less complete vacuum. Origin: Cf. F. Receveur. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| receiver cell | <plant biology> Cells in the photosynthetic tissues of plants into which the solutes from xylem are pumped. (18 Nov 1997) |
| characteristic | Synonym: character. 2. Typical or distinctive of a particular disorder. (05 Mar 2000) |
| characteristic curve | Sensitometric curve of radiographic film, a plot of the film density versus the logarithm of the relative exposure. Synonym: H and D curve, Hunter and Driffield curve. (05 Mar 2000) |
| characteristic emission | Monochromatic radiation that is produced when an electron is ejected from an atom and another takes its place by jumping from another shell; the energy of the photon is the difference between that of the two shell positions. Synonym: characteristic emission. (05 Mar 2000) |
| characteristic radiation | Monochromatic radiation that is produced when an electron is ejected from an atom and another takes its place by jumping from another shell; the energy of the photon is the difference between that of the two shell positions. Synonym: characteristic emission. (05 Mar 2000) |
| characteristic X-ray | <microscopy> An X-ray having a unique energy that is emitted by an atom in the sample during its de-energization after ionization of one of its electrons by an incident electron. (05 Aug 1998) |
| standard operating procedure | <microscopy> A written set of instructions detailing the normal procedures for operating a piece of equipment. WWW: Available online (05 Aug 1998) |
| operating microscope | <instrument> A binocular microscope used to obtain good visualization of fine structures in the operating field; in the standing type of microscope, a motorised zoom lens system operated by hand or foot controls provides an adjustable working distance; in headborne models, interchangeable oculars provide the magnification needed. Synonym: operating microscope. (05 Mar 2000) |
| operating room information systems | Information systems, usually computer-assisted, designed to store, manipulate, and retrieve information for planning, organizing, directing, and controlling administrative activities associated with the provision and utilization of operating room services and facilities. (12 Dec 1998) |
| operating room nursing | The functions of the professional nurse in the operating room. (12 Dec 1998) |
| operating rooms | Facilities equipped for performing surgery. (12 Dec 1998) |
| operating room technicians | Specially trained personnel to assist in routine technical procedures in the operating room. (12 Dec 1998) |
| operating table | A table on which the patient lies during a surgical operation. (05 Mar 2000) |