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

A white crystalline aromatic hydrocarbon, C10H8, analogous to benzene, and obtained by the distillation of certain bituminous materials, such as the heavy oil of coal tar. It is the type and basis of a large number of derivatives among organic compounds. Formerly called also naphthaline. Naphthalene red (Chem.), a dyes…

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.

A dyestuff, resembling alizarin, obtained from naphthoquinone as a red crystalline substance with a bright green, metallic luster; -- called also naphthalizarin.

A peculiar hydrocarbon occuring as an ingredient of Caucasian petroleum.

A compound of naphthalene or its radical with a metallic element; as, mercuric naphthide.

Pertaining to, derived from, or related to, naphthalene; -- used specifically to designate any one of a series of carboxyl derivatives, called naphthoic acids.

Any one of a series of hydroxyl derivatives of naphthalene, analogous to phenol. In general they are crystalline substances with a phenol (carbolic) odor. Naphthol blue, Naphthol orange, Naphthol yellow (Chem.), brilliant dyestuffs produced from certain complex nitrogenous derivatives of naphthol or naphthoquinone.…

A yellow crystalline substance, C10H6O2, analogous to quinone, obtained by oxidizing naphthalene with chromic acid.

A hydrocarbon radical regarded as the essential residue of naphthalene.

One of two basic amido derivatives of naphthalene, C10H7.NH2, forming crystalline solids.

containing the numbers of a column of the multiplication table; -- a contrivance of Baron Napier, the inventor of logarithms, for facilitating the operations of multiplication and division.

Of, pertaining to, or discovered by, Napier, or Naper. Naperian logarithms. See under Logarithms.

Turnip-shaped; large and round in the upper part, and very slender below.

A handkerchief. [Obs.] Shak. Napkin pattern. See Linen scroll, under Linen. -- Napkin ring, a ring of metal, ivory, or other material, used to inclose a table napkin.

See under Yellow.