| film, pa | An X-ray picture in which the beams pass from back-to-front (posteroanterior). As opposed to an AP (anteroposterior) film in which the rays pass through the body from front-to-back. (12 Dec 1998) |
|---|---|
| filmcoated | Coated by a thin transparent sheet of cellulose acetate or similar material with an emulsion that is sensitive to light or radiation. (18 Nov 1997) |
| Filmer, David | <person> U.S. Biochemist, *1932. See: Adair-Koshland-Nemethy-Filmer model, Koshland-Nemethy-Filmer model. (05 Mar 2000) |
| filoplumaceous | <zoology> Having the structure of a filoplume. Source: Websters Dictionary (01 Mar 1998) |
| filoplume | <zoology> A hairlike feather; a father with a slender scape and without a web in most or all of its length. Origin: L. Filum a thread pluma a soft feather. Source: Websters Dictionary (01 Mar 1998) |
| filopodia | Plural of filopodium. (05 Mar 2000) |
| filopodium | A thin protrusion from a cell, usually supported by microfilaments, may be functionally the linear equivalent of the leading lamella. (18 Nov 1997) |
| filopressure | Temporary pressure on a blood vessel by a ligature, which is removed when the flow of blood has ceased. Origin: L. Filum, thread (05 Mar 2000) |
| filovaricosis | A series of swellings along the course of the axon of a nerve fibre. Origin: L. Filum, thread, + varix, dilation of vein (05 Mar 2000) |
| filoviridae | |
| filoviridae infections | Infections with viruses of the family filoviridae. The infections in humans consist of a variety of clinically similar viral haemorrhagic fevers but the natural reservoir host is unknown. (12 Dec 1998) |
| filovirus | <virology> A synthetic auxin, also used as a selective herbicide. (18 Nov 1997) |
| filovirus infections | Infections with viruses of the genus filovirus, family filoviridae. (12 Dec 1998) |
| filter | 1. A porous substance through which a liquid or gas is passed in order to separate it from contained particulate matter or impurities. Synonym: filtrum. 2. To use or to subject to the action of a filter. 3. In diagnostic or therapeutic radiology, a plate made of one or more metals such as aluminum and copper that, placed in the x-or gamma-ray beam, permits passage of a greater proportion of higher energy radiation and attenuation of lower and less desirable energy radiation, raising the average energy or hardening the beam. 4. A device used in spectrophotometric analysis to isolate a segment of the spectrum. 5. A mathematical algorithm applied to image data for the purpose of enhancing image quality, usually by suppression of high spatial frequency noise. Origin: Mediev. L. Filtro, pp. -atus, to strain through felt, fr. Filtrum, felt (05 Mar 2000) |
| filter fabric | A fabric used to collect sediment from water flowing through a creek or through a gully. (09 Oct 1997) |