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Fluosilicate :: Fluosilicate (n.) A double fluoride of silicon and some other (usually basic) element or radical, regarded as a salt of fluosilicic acid; -- called also silicofluoride..

Phthalein :: Phthalein (n.) One of a series of artificial organic dyes made as condensation products of the phenols with phthalic acid, and well represented by phenol phthalein. Their alkaline solutions are fluorescent..

Stannoso- :: Stannofluoride (n.) Any one of a series of double fluorides of tin (stannum) and some other element.

Fluosilicic :: Fluosilicic (a.) Composed of, or derived from, silicon and fluorine..

Fluocerite :: Fluocerite (n.) A fluoride of cerium, occuring near Fahlun in Sweden. Tynosite, from Colorado, is probably the same mineral..

Fluorescence :: Fluorescence (n.) That property which some transparent bodies have of producing at their surface, or within their substance, light different in color from the mass of the material, as when green crystals of fluor spar afford blue reflections. It is due not to the difference in the color of a distinct surface layer, but to the power which the substance has of modifying the light incident upon it. The light emitted by fluorescent substances is in general of lower refrangibility than the incident l

Erythrosin :: Erythrosin (n.) A red dyestuff obtained from fluorescein by the action of iodine.

Fluohydric :: Fluohydric (a.) See Hydrofluoric.

Hydrofluosilicic :: Hydrofluosilicic (a.) Pertaining to, or denoting, a compound consisting of a double fluoride of hydrogen and silicon; silicofluoric. See Silicofluoric..

Phthor :: Phthor (n.) Fluorine.

Fluorescein :: Fluorescein (n.) A yellowish red, crystalline substance, C20H12O5, produced by heating together phthalic anhydride and resorcin; -- so called, from the very brilliant yellowish green fluorescence of its alkaline solutions. It has acid properties, and its salts of the alkalies are known to the trade under the name of uranin..

Haloid :: Haloid (a.) Resembling salt; -- said of certain binary compounds consisting of a metal united to a negative element or radical, and now chiefly applied to the chlorides, bromides, iodides, and sometimes also to the fluorides and cyanides..

Curcumin :: Curcumin (n.) The coloring principle of turmeric, or curcuma root, extracted as an orange yellow crystalline substance, C14H14O4, with a green fluorescence..

Esculin :: Esculin (n.) A glucoside obtained from the Aesculus hippocastanum, or horse-chestnut, and characterized by its fine blue fluorescent solutions..

Titano- :: Titano- () A combining form (also used adjectively) designating certain double compounds of titanium with some other elements; as, titano-cyanide, titano-fluoride, titano-silicate, etc..

Halogen :: Halogen (n.) An electro-negative element or radical, which, by combination with a metal, forms a haloid salt; especially, chlorine, bromine, and iodine; sometimes, also, fluorine and cyanogen. See Chlorine family, under Chlorine..

Radiograph :: Radiograph (n.) A picture produced by the Rontgen rays upon a sensitive surface, photographic or fluorescent, especially a picture of opaque objects traversed by the rays..

Fluoride :: Fluoride (n.) A binary compound of fluorine with another element or radical.

Flux :: Flux (n.) Any substance or mixture used to promote the fusion of metals or minerals, as alkalies, borax, lime, fluorite..

Fluorene :: Fluorene (n.) A colorless, crystalline hydrocarbon, C13H10 having a beautiful violet fluorescence; whence its name. It occurs in the higher boiling products of coal tar, and is obtained artificially..

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