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Containing, or composed of, silicon and fluorine; especially, denoting the compounds called silicofluorides. Silicofluoric acid (Chem.), a compound of hydrofluoric acid and silicon fluoride, known only in watery solution. It is produced by the action of silicon fluoride on water, and is regarded as an acid, H2SiF6, and…

A fluosilicate; a salt of silicofluoric acid.

Any one of a series of double fluorides of tin (stannum) and some other element.

A double fluoride of zirconium and hydrogen, or some other positive element or radical; as, zircofluoride of sodium.

in to decompose or waste. On the fourth of March he was attacked by fever. Macaulay. Hydrofluoric acid . . . attacks the glass. B. Stewart.

A name given to fluor spar in Derbyshire, where it is used for ornamental purposes.

Fluor spar. See Kand.

ng, and disinfecting agent. Symbol Cl. Atomic weight, 35.4. Chlorine family, the elements fluorine, chlorine, bromine, and iodine, called the halogens, and classed together from their common peculiariries.

A variety of fluor spar, which, when heated, gives a beautiful emerald green light.

to napthalene and anthracene. It is a white crystalline substance, C18H12, of strong blue fluorescence, but generally colored yellow by impurities.

The last part of anything; close; termination; end. A fluorish of trumpets announced the conclusion of the contest. Prescott.

A blue, fluorescent, oily base (regarded as a derivative of pyridine), obtained from conine.

A fluoride of sodium and aluminum, found in Greenland, in white cleavable masses; -- used as a source of soda and alumina.

curcuma root, extracted as an orange yellow crystalline substance, C14H14O4, with a green fluorescence.

A massive variety of fluor spar, found in Derbyshire, England, and wrought into vases and other ornamental work.

A yellow or brownish red dyestuff obtained by the action of bromine on fluoresceïn, and named from the fine rose-red which it imparts to silk. It is also used for making a fine red ink. Its solution is fluorescent.

Producing, or relating to, epipolism or fluorescence. [R.]

See Fluorescence. [R.] Sir J. Herschel.

Changed to the epipolic condition, or that in which the phenomenon of fluorescence is presented; produced by fluorescence; as, epipolized light. [R.] Stokes.

A red dyestuff obtained from fluoresceïn by the action of iodine.