Search the Dictionary

A color of a delicate purple, violet, or lilac. Mauve aniline (Chem.), a dyestuff produced artificially by the oxidation of commercial aniline, and the first discovered of the so-called coal- tar, or aniline, dyes. It consists of the sulphate of mauveïne, and is a dark brown or bronze amorphous powder, which dissolves…

nic base, obtained by oxidizing a mixture of aniline and toluidine, and valuable for the dyestuffs it forms. [Written also mauvine.]

bromide, CH2Br2; -- formerly called also methene. Methylene blue (Chem.), an artificial dyestuff consisting of a complex sulphur derivative of diphenyl amine; -- called also pure blue.

A yellow dyestuff extracted from the root bark of an East Indian plant (Morinda citrifolia).

es 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 naphthol.

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

enol (carbolic) odor. Naphthol blue, Naphthol orange, Naphthol yellow (Chem.), brilliant dyestuffs produced from certain complex nitrogenous derivatives of naphthol or naphthoquinone.

The complex, nitrogenous, organic base and dyestuff called also aniline black.

A dark blue dyestuff, of the induline group; -- called also azodiphenyl blue.

An eyestalk; the organ which bears the compound eyes of decapod Crustacea.

A reddish brown amorphous dyestuff,

An artifical red nitrogenous dyestuff, called also red coralline.

alline substance, C6H4.(CO2H)2, analogous to benzoic acid, and employed in the brilliant dyestuffs called the phthaleins.

The eyestalk of a crustacean.

plication, and thanksgiving. And to his goddess pitously he preyde. Chaucer. When thou prayest, enter into thy closet, and when thou hast shut thy door, pray to thy Father which is in secret; and thy Father which seeth in secret shall reward thee openly. Matt. vi. 6. I pray, or (by ellipsis) Pray, I beg; I request; I e…

Of or pertaining to the day before, or yesterday. [R.] Thackeray.

A dyestuff resembling alizarin, found in madder root, and extracted as an orange or red crystalline substance.

varieties are known, a and g. g-pyrone is the parent substance of several natural yellow dyestuffs.

pigment prepared by the Dutch, similar to Indian red. -- Hypericum red, a red resinous dyestuff extracted from Hypericum. -- Indian red. See under Indian, and Almagra.

, etc., with caustic potash. It is also produced artificially and used in making certain dyestuffs, as phthaleïn, fluoresceïn, and eosin.