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One of the whitish specks called aphthæ.

Roundish pearl-colored specks or flakes in the mouth, on the lips, etc., terminating in white sloughs. They are commonly characteristic of thrush.

iquids obtained by the distillation of certain carbonaceous materials and resembling the naphtha from petroleum; as, Boghead naphtha, from Boghead coal (obtained at Boghead, Scotland); crude naphtha, or light oil, from coal tar; wood naphtha, from wood, etc.

A salt of naphthalic acid; a phthalate. [Obs.]

and basis of a large number of derivatives among organic compounds. Formerly called also naphthaline. Naphthalene red (Chem.), a dyestuff obtained from certain diazo derivatives of naphthylamine, and called also magdala red. -- Naphthalene yellow (Chem.), a yellow dyestuff obtained from certain nitro derivatives of na…

Pertaining to , or derived from, naphthalene; -- used specifically to designate a yellow crystalline substance, called naphthalenic acid and also hydroxy quinone, and obtained from certain derivatives of naphthol.

Pertaining to, derived from, or related to, naphthalene; -- used specifically to denote any one of a series of acids derived from naphthalene, and called naphthalene acids.

Same as Naphthylamine.

See Naphthalene.

To mingle, saturate, or impregnate, with naphtha.

none as a red crystalline substance with a bright green, metallic luster; -- called also naphthalizarin.

Anthracene; -- called also paranaphthaline. [Obs.]

A solid hydrocarbon, C6H4.C2H2.C6H4, which accompanies naphthalene in the last stages of the distillation of coal tar. Its chief use is in the artificial production of alizarin. [Written also anthracin.]

combustion engines (using volatile inflammable liquids, as gasoline or petrol, alcohol, naphtha, etc.), steam engines, or electric motors. The power of the driving motor varies from about 4 to 50 H. P. for ordinary vehicles, ranging from the run-about to the touring car, up to as high as 200 H. P. for specially built…

A volatile, very inflammable liquid, C6H6, contained in the naphtha produced by the destructive distillation of coal, from which it is separated by fractional distillation. The name is sometimes applied also to the impure commercial product or benzole, and also, but rarely, to a similar mixed product of petroleum. Benz…

ed also petroleum spirit, petroleum benzine. Varieties or similar products are gasoline, naphtha, rhigolene, ligroin, etc.

the semisolid maltha and mineral tars, the oily petroleums, and even the light, volatile naphthas.

ssively heated. Burning fluid, any volatile illuminating oil, as the lighter petroleums (naphtha, benzine), or oil of turpentine (camphine), but esp. a mixture of the latter with alcohol. -- Burning glass, a conxex lens of considerable size, used for producing an intense heat by converging the sun's rays to a focus.…

nt oily liquids, belonging to the pyridine series, and obtained from bone oil, coal tar, naphtha, and certain alkaloids.

carried on a pole in nocturnal processions. Starry lamps and blazing cressets, fed With naphtha and asphaltus. Milton. As a cresset true that darts its length Of beamy luster from a tower of strength. Wordsworth.