| flux | <radiobiology> The total amount of a quantity passing through a given surface per unit time. Typical quantities include (magnetic) field lines, particles, heat, energy, mass of fluid, etc. Common usage in plasma physics is for flux by itself to mean magnetic field flux, unless specified otherwise. (09 Oct 1997) |
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| flux density | <radiobiology> Total amount of a quantity passing through a unit surface area in unit time See: flux. (09 Oct 1997) |
| flux ratio | The ratio of the two unidirectional fluxes through a particular boundary layer or membrane. (05 Mar 2000) |
| flux, light | <microscopy> Sometimes called luminous flux, the visible portion of the radiant energy emitted by a light source. It is measured in lumens per solid angle. In electrical engineering, it is analogous to the lines of force in a magnetic field, spoken of as magnetic flux. (05 Aug 1998) |
| fluxion | The act of flowing. 2. The matter that flows. 3. Fusion; the running of metals into a fluid state. 4. <medicine> An unnatural or excessive flow of blood or fluid toward any organ; a determination. 5. A constantly varying indication. "Less to be counted than the fluxions of sun dials." (De Quincey) 6. <mathematics> The infinitely small increase or decrease of a variable or flowing quantity in a certain infinitely small and constant period of time; the rate of variation of a fluent; an incerement; a differential. Pl. A method of analysis developed by Newton, and based on the conception of all magnitudes as generated by motion, and involving in their changes the notion of velocity or rate of change. Its results are the same as those of the differential and integral calculus, from which it differs little except in notation and logical method. Origin: Cf. F. Fluxion. Source: Websters Dictionary (01 Mar 1998) |
| fluxional | Pertaining to, or having the nature of, fluxion or fluxions; variable; inconstant. " The merely human,the temporary and fluxional. <geology> " (Coleridge) Fluxional structure, fluidal structure. Source: Websters Dictionary (01 Mar 1998) |
| fluxionary | 1. Fluxional. 2. <medicine> Pertaining to, or caused by, an increased flow of blood to a part; congestive; as, a fluxionary hemorrhage. Source: Websters Dictionary (01 Mar 1998) |
| fluxionary hyperaemia | active hyperaemia |
| fluxions | <mathematics> See Fluxion. Source: Websters Dictionary (01 Mar 1998) |
| bloody flux | The dysentery, a disease in which the flux or discharge from the bowels has a mixture of blood. Source: Websters Dictionary (01 Mar 1998) |
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| net flux | The difference between the two unidirectional flux's. (05 Mar 2000) |
| integrated neutron flux | <radiobiology> Sum (integral) of the neutron flux (neutrons per unit time per unit area, see flux) over all time, total number of neutrons which passed through a unit area. Important figure-of-merit in testing effects of neutron radiation on materials, and in assessing how long such materials can survive exposure to neutron sources (such as fission reactor cores and D-T fusion plasmas). (09 Oct 1997) |
| either particle flux density | The particle fluence rate, or energy flux density, the energy fluence rate of intensity. Compare: fluence. (05 Mar 2000) |
| toroidal flux | <radiobiology> Magnetic field flux in the toroidal direction. See: magnetic fields. (09 Oct 1997) |
| unidirectional flux | The flux of a substance from one surface of a boundary layer or membrane to the other, disregarding any counterbalancing flux in the other direction, as measured by tracer technique. (05 Mar 2000) |
| luminous flux | The quantity of light emitted from a point source in a given time; its unit is the lumen. (05 Mar 2000) |