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ted from fustet, and regarded as its essential coloring principle; -- called also fisetic acid.

Stable; non-volatile. Fixed air (Old Chem.), carbonic acid or carbon dioxide; -- so called by Dr. Black because it can be absorbed or fixed by strong bases. See Carbonic acid, under Carbonic. -- Fixed alkali (Old Chem.), a non-volatile base, as soda, or potash, in distinction from the volatile alkali ammonia. -- Fixe…

eckle. -- Flax cotton, the fiber of flax, reduced by steeping in bicarbinate of soda and acidulated liquids, and prepared for bleaching and spinning like cotton. Knight. -- Flax dresser, one who breaks and swingles flax, or prepares it for the spinner. -- Flax mill, a mill or factory where flax is spun or linen manu…

A salt of fluoboric acid; a fluoboride.

Pertaining to, derived from, or consisting of, fluorine and boron. Fluoridic acid (Chem.), a double fluoride, consisting essentially of a solution of boron fluoride, in hydrofluoric acid. It has strong acid properties, and is the type of the borofluorides. Called also borofluoric acid.

A double salt of fluoric and phosphoric acids.

d, 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.

A non-metallic, gaseous element, strongly acid or negative, or associated with chlorine, bromine, and iodine, in the halogen group of which it is the first member. It always occurs combined, is very active chemically, and possesses such an avidity for most elements, and silicon especially, that it can neither be prepar…

icon and some other (usually basic) element or radical, regarded as a salt of fluosilicic acid; -- called also silicofluoride.

Composed of, or derived from, silicon and fluorine. Fluosilicic acid, a double fluoride of hydrogen and silicon, H2F6Si, obtained in solution in water as a sour fuming liquid, and regarded as the type of the fluosilicates; -- called also silicofluoric acid, and hydrofluosilicic acid.

g acetic or ethyl aldehyde, and chemically intermediate between methyl alcohol and formic acid.

A salt of formic acid. [Written also formiate.]

Pertaining to, or derived from, ants; as, formic acid; in an extended sense, pertaining to, or derived from, formic acid; as, formic ether. Amido formic acid, carbamic acid. -- Formic acid, a colorless, mobile liquid, HCO.OH, of a sharp, acid taste, occurring naturally in ants, nettles, pine needles, etc., and produce…

A univalent radical, H.C:O, regarded as the essential residue of formic acid and aldehyde.

or drived from, frangulin, or a species (Rhamnus Frangula) of the buckthorn. Frangulinic acid (Chem.), a yellow crystalline substance, resembling alizarin, and obtained by the decomposition of frangulin.

anything else; separated; dissevered; unattached; at liberty to escape; as, free carbonic acid gas; free cells. Free agency, the capacity or power of choosing or acting freely, or without necessity or constraint upon the will. -- Free bench (Eng. Law), a widow's right in the copyhold lands of her husband, correspondin…

ter in a vacuum; a cryophous. -- Frost grape (Bot.), an American grape, with very small, acid berries. -- Frost lamp, a lamp placed below the oil tube of an Argand lamp to keep the oil limpid on cold nights; -- used especially in lighthouses. Knight. -- Frost nail, a nail with a sharp head driven into a horse's shoe…

A salt of fulminic acid. See under Fulminic.

lmination; detonating; specifically (Chem.), pertaining to, derived from, or denoting, an acid, so called; as, fulminic acid. Fulminic acid (Chem.), a complex acid, H2C2N2O2, isomeric with cyanic and cyanuric acids, and not known in the free state, but forming a large class of highly explosive salts, the fulminates. Of…

Pertaining to fulminic and cyanuric acids, and designating an acid so called. Fulminuric acid (Chem.), a white, crystalline, explosive subatance, H3C3N3O3, forming well known salts, and obtained from the fulnunates. It is isomeric with cyanuric acid, and hence is also called isocyanuric acid.