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An alkaloid found in nux vomica, and extracted as a white crystalline substance.

A dark yellow, crystalline substance, obtained by the action of ammonia on isatin.

n amorphous powder. -- Indigo snake (Zoöl.), the gopher snake. -- Indigo white, a white crystalline powder obtained by reduction from indigo blue, and by oxidation easily changed back to it; -- called also indigogen. -- Indigo yellow, a substance obtained from indigo.

A dark red crystalline substance, isomeric with and resembling indigo blue, and obtained from isatide and dioxindol.

A white, crystalline substance, C8H7N, obtained from blue indigo, and almost all indigo derivatives, by a process of reduction. It is also formed from albuminous matter, together with skatol, by putrefaction, and by fusion with caustic potash, and is present in human excrement, as well as in the intestinal canal of som…

A white crystalline substance with a sweet taste, found in certain animal tissues and fluids, particularly in the muscles of the heart and lungs, also in some plants, as in unripe pease, beans, potato sprouts, etc. Called also phaseomannite.

ula, Helianthus, Campanula, etc., and is extracted by solution as a tasteless, white, semicrystalline substance, resembling starch, with which it is isomeric. It is intermediate in nature between starch and sugar. Called also dahlin, helenin, alantin, etc.

A yellow, crystalline, volatile substance, CI3H, having an offensive odor and sweetish taste, and analogous to chloroform. It is used in medicine as a healing and antiseptic dressing for wounds and sores.

A white crystalline substance obtained by the partial reduction of isatin. [Written also isatyde.]

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. [Written also, less properly, isatine.]

ertaining to, derived from, or designating, an acid, HO.C2H4.SO3H, obtained as an oily or crystalline substance, by the action of sulphur trioxide on alcohol or ether. It is derivative of sulphuric acid.

A white, crystalline, sugarlike substance, obtained by the decomposition of certain glucosides, and intermediate in nature between the hexacid alcohols (ductile, mannite, etc.) and the glucoses.

A substance which is similar to another in crystalline form and composition.

A similarity of crystalline form between substances of similar composition, as between the sulphates of barium (BaSO4) and strontium (SrSO4). It is sometimes extended to include similarity of form between substances of unlike composition, which is more properly called homoeomorphism.

A crystalline, nitrogenous base, C10H14N2, isomeric with nicotine.

A crystalline hydrocarbon derivative, metameric with orcin, but produced artificially; -- called also cresorcin.

An artificial nitrogenous base, isomeric with urea, and forming a white crystalline substance; -- called also isuretine.

Pertaining to, or designating, an acid, C5H6O4, which is obtained as a white crystalline substance by decomposing aconitic and other organic acids.

A yellow crystalline substance resembling quinone, extracted from green shucks of the walnut (Juglans regia); -- called also nucin.

A pale buff or white crystalline alkaloid derived from quinoline, and used as an antipyretic in medicine.