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Zaffer :: Zaffer (n.) A pigment obtained, usually by roasting cobalt glance with sand or quartz, as a dark earthy powder. It consists of crude cobalt oxide, or of an impure cobalt arseniate. It is used in porcelain painting, and in enameling pottery, to produce a blue color, and is often confounded with smalt, from which, however, it is distinct, as it contains no potash. The name is often loosely applied to mixtures of zaffer proper with silica, or oxides of iron, manganese, etc..

Gage :: Gage (n.) A variety of plum; as, the greengage; also, the blue gage, frost gage, golden gage, etc., having more or less likeness to the greengage. See Greengage..

Blue :: Blue (superl.) Pale, without redness or glare, -- said of a flame; hence, of the color of burning brimstone, betokening the presence of ghosts or devils; as, the candle burns blue; the air was blue with oaths..

Bluestocking :: Bluestocking (n.) A literary lady; a female pedant.

Speedwell :: Speedwell (n.) Any plant of the genus Veronica, mostly low herbs with pale blue corollas, which quickly fall off..

Bluepoll :: Bluepoll (n.) A kind of salmon (Salmo Cambricus) found in Wales.

Gentian :: Gentian (n.) Any one of a genus (Gentiana) of herbaceous plants with opposite leaves and a tubular four- or five-lobed corolla, usually blue, but sometimes white, yellow, or red. See Illust. of Capsule..

Cherub :: Cherub (n.) One of a order of angels, variously represented in art. In European painting the cherubim have been shown as blue, to denote knowledge, as distinguished from the seraphim (see Seraph), and in later art the children's heads with wings are generally called cherubs..

Pyocyanin :: Pyocyanin (n.) A blue coloring matter found in the pus from old sores, supposed to be formed through the agency of a species of bacterium (Bacillus pyocyaneus)..

Moroxite :: Moroxite (n.) A variety of apatite of a greenish blue color.

Isatin :: Isatin (n.) An orange-red crystalline substance, C8H5NO2, obtained by the oxidation of indigo blue. It is also produced from certain derivatives of benzoic acid, and is one important source of artificial indigo..

Watchet :: Watchet (a.) Pale or light blue.

Indophenol :: Indophenol (n.) Any one of a series of artificial blue dyestuffs, resembling indigo in appearance, and obtained by the action of phenol on certain nitrogenous derivatives of quinone. Simple indophenol proper has not yet been isolated..

Covellite :: Covellite (n.) A native sulphide of copper, occuring in masses of a dark blue color; -- hence called indigo copper..

Uroglaucin :: Uroglaucin (n.) A body identical with indigo blue, occasionally found in the urine in degeneration of the kidneys. It is readily formed by oxidation or decomposition of indican..

Snowbird :: Snowbird (n.) Any finch of the genus Junco which appears in flocks in winter time, especially J. hyemalis in the Eastern United States; -- called also blue snowbird. See Junco..

Caesium :: Caesium (n.) A rare alkaline metal found in mineral water; -- so called from the two characteristic blue lines in its spectrum. It was the first element discovered by spectrum analysis, and is the most strongly basic and electro-positive substance known. Symbol Cs. Atomic weight 132.6..

Blueback :: Blueback (n.) A trout (Salmo oquassa) inhabiting some of the lakes of Maine.

True-blue :: True-blue (n.) A person of inflexible integrity or fidelity.

Glaucus :: Glaucus (n.) A genus of nudibranchiate mollusks, found in the warmer latitudes, swimming in the open sea. These mollusks are beautifully colored with blue and silvery white..

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