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A light hydrocarbon oil resembling kerosene. It is obtained by distilling coal, paraffin, etc., and is used as a lubricant, illuminant, etc. [Written also photogene.]

A picture or likeness obtained by photography.

Of or pertaining to photography; obtained by photography; used ib photography; as a photographic picture; a photographic camera. -- Pho`to*graph"ic*al*ly, adv. Photographic printing, the process of obtaining pictures, as on chemically prepared paper, from photographic negatives, by exposure to light.…

era, by which a series of photographs of the variations of the arc due to sound waves are obtained for reproduction by means of a selenium cell and a telephone.

Pertaining to, or designating, any photographic process in which a printing surface is obtained without the intervention of hand engraving.

A printing surface in relief, obtained by photographic means and subsequent manipulations. Knight.

wo pictures taken at the same moment, measurements in all dimensions of the region may be obtained.

A plate or block with a printing surface (usually in relief) obtained from a photograph; also, any one of the many methods of processes by which such a printing surface is obtained.

Pertaining to, or designating, a dibasic acid obtained by the oxidation of naphthalene and allied substances. Phthalic acid (Chem.), a white crystalline substance, C6H4.(CO2H)2, analogous to benzoic acid, and employed in the brilliant dyestuffs called the phthaleins.

A lactone obtained by reduction of phthalyl chloride, as a white crystalline substance; hence, by extension, any one of the series of which phthalide proper is the type. [Written also phthalid.]

An imido derivative of phthalic acid, obtained as a white crystalline substance, C6H4.(CO)2NH, which has itself (like succinimide) acid properties, and forms a series of salts. Cf. Imido acid, under Imido.

A colorless crystalline substance obtained by reduction from phthaleïn, into which it is easily converted by oxidation; hence, any one of the series of which phthalin proper is the type.

A fine fabric for scarfs, handkerchiefs, embroidery, etc., woven from the fiber obtained from the leaf of the sterile pineapple plant. It is delicate, soft, and transparent, with a tinge of pale yellow.

Any one of three isometric bases (C6H7N) related to pyridine, and obtained from bone oil, acrolein ammonia, and coal-tar naphtha, as colorless mobile liquids of strong odor; -- called also methyl pyridine.

Pertaining to, or designating, a substance obtained from certain fatty substances, and subsequently shown to be a mixture of suberic and adipic acids.

A colorless oily liquid related to the ketones, and obtained by the decomposition of pinacone; hence, by extension, any one of the series of which pinacolin proper is the type. [Written also pinacoline.]

-- Pine-needle wool. See Pine wool (below). -- Pine oil, an oil resembling turpentine, obtained from fir and pine trees, and used in making varnishes and colors. -- Pine snake (Zoöl.), a large harmless North American snake (Pituophis melanoleucus). It is whitish, covered with brown blotches having black margins. Ca…

id copal, and white dammar. -- Piney tallow, a solid fatty substance, resembling tallow, obtained from the roasted seeds of the Vateria Indica; called also dupada oil. -- Piney thistle (Bot.), a plant (Atractylis gummifera), from the bark of which, when wounded, a gummy substance exudes.

Of or pertaining to the pine; obtained from the pine; formerly, designating an acid which is the chief constituent of common resin, - - now called abietic, or sylvic, acid.

kaloid, C5H11N, having a hot, peppery, ammoniacal odor. It is related to pyridine, and is obtained by the decomposition of piperine.