[floo-res-uh ns, flaw-, floh-] /flʊˈrɛs əns, flɔ-, floʊ-/
noun, Physics, Chemistry.
the emission of radiation, especially of visible light, by a substance during exposure to external radiation, as light or x-rays.
Compare (def 1).
the property possessed by a substance capable of such emission.
the radiation so produced.
the radiation emitted as a result of fluorescence Compare phosphorescence
1852, “glowing in ultraviolet light,” coined by English mathematician and physicist Sir George G. Stokes (1819-1903) from fluorspar (see fluorine), because in it he first noticed the phenomenon, + -escence, on analogy of phosphorescence.
fluorescence fluo·res·cence (flu-rěs’əns, flô-)
The emission of light from an object as a result of bombardment by other kinds of electromagnetic radiation, such as x-rays or ultraviolet rays. Fluorescent materials may appear one color when bathed in visible light and another color when exposed to other kinds of electromagnetic radiation.
Note: “Black light” depends on fluorescence for its effects.
[floo-res-ee-in, flaw-, floh-] /flʊˈrɛs i ɪn, flɔ-, floʊ-/ noun, Chemistry. 1. an orange-red, crystalline, water-insoluble solid, C 20 H 12 O 5 , that in alkaline solutions produces an orange color and an intense green fluorescence: used to trace subterranean waters and in dyes. /ˌflʊəˈrɛsɪɪn/ noun 1. an orange-red crystalline compound that in aqueous solution […]
- Fluorescence-activated cell sorter
[floo-res-uh ns ak-ti-vey-tid, flaw-, floh-] /flʊˈrɛs əns ˌæk tɪˌveɪ tɪd, flɔ-, floʊ-/ noun 1. .
[floo-res-uh nt, flaw-, floh-] /flʊˈrɛs ənt, flɔ-, floʊ-/ adjective 1. possessing the property of ; exhibiting . 2. strikingly bright, vivid, or glowing: plastic toys in fluorescent colors. noun 3. a lighting fixture that utilizes a . /ˌflʊəˈrɛsənt/ adjective 1. exhibiting or having the property of fluorescence adj. 1853, from fluor- + -escent (see fluorescence). […]
- Fluorescent antibody technique
fluorescent antibody technique n. Either of two techniques used to test for antigen with a fluorescent antibody: direct, in which immunoglobulin conjugated with a fluorescent dye is added to tissue and combines with a specific antigen; or indirect, in which unlabeled immunoglobulin is added to tissue and combines with a specific antigen, after which the […]