| flue | An inclosed passage way for establishing and directing a current of air, gases, etc.; an air passage; especially., A compartment or division of a chimney for conveying flame and smoke to the outer air. A passage way for conducting a current of fresh, foul, or heated air from one place to another. A pipe or passage for conveying flame and hot gases through surrounding water in a boiler; distinguished from a tube which holds water and is surrounded by fire. Small flues are called fire tubes or simply tubes. Flue boiler. See Boiler. Flue bridge, the separating low wall between the flues and the laboratory of a reverberatory furnace. Flue plate, the aggregate surface of flues exposed to flame or the hot gases. Origin: Cf. OF. Flue a flowing, fr. Fluer to flow, fr. L. Fluere (cf. Fluent); a perh. A corruption of E. Flute. Source: Websters Dictionary (01 Mar 1998) |
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| fluence | A measure of the quantity of x-radiation in a beam in diagnostic radiology, either particle fluence, the number of photons entering a sphere of unit cross-sectional area, or energy fluence, the sum of the energies of the photons passing through a unit area. Compare: flux. Origin: L. Fluentia, a flowing, fr. Fluo, to flow (05 Mar 2000) |
| fluent | 1. A current of water; a stream. 2. [Cf. F. Fluente. <mathematics> A variable quantity, considered as increasing or diminishing; called, in the modern calculus, the function or integral. Source: Websters Dictionary (01 Mar 1998) |
| fluent aphasia | Aphasia in which there is impairment in the comprehension of spoken and written words, associated with effortless, articulated, but paraphrasic, speech and writing; malformed words, substitute words, and enologisms are charcteristic. When severe, and speech is incomprehensible, it is called jargon aphasia. The patient often appears unaware of his deficit. Synonym: fluent aphasia, impressive aphasia, posterior aphasia, psychosensory aphasia, receptive aphasia, Wernicke's aphasia. (05 Mar 2000) |