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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.]

rtaining 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.

awn through certain points in experiments on the chromatic effects of polarized light in crystals.

Developed alike in the directions of the several lateral axes; -- said of crystals of both the tetragonal and hexagonal systems.

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.

Noting, or conforming to, that system of crystallization in which the three axes are of equal length and at right angles to each other; monometric; regular; cubic. Cf. Crystallization. Isometric lines (Thermodynamics), lines representing in a diagram the relations of pressure and temperature in a gas, when the volume r…

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.

An ocher-yellow mineral occurring on minute rhombohedral crystals. It is a hydrous sulphate of iron and potash.

out the size of cherries. -- Jerusalem oak (Bot.), an aromatic goosefoot (Chenopodium Botrys), common about houses and along roadsides. -- Jerusalem sage (Bot.), a perennial herb of the Mint family (Phlomis tuberosa). -- Jerusalem thorn (Bot.), a spiny, leguminous tree (Parkinsonia aculeata), widely dispersed in war…

A bearing for a pivot a pivot in a watch, formed of a crystal or precious stone, as a ruby. Jewel block (Naut.), block at the extremity of a yard, through which the halyard of a studding sail is rove.

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

A yellow carangoid fish of the Atlantic and Gulf coasts (Caranx chrysos), most abundant southward, where it is valued as a food fish; -- called also hardtail, horse crevallé, jack, buffalo jack, skipjack, yellow mackerel, and sometimes, improperly, horse mackerel. Other species of Caranx (as C. fallax) are also sometim…

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

The cocoon or chrysalis of an insect. B. Jonson.

ethyl ketol and related to indol. Methyl ketol, a weak organic base, obtained as a white crystalline substance having the odor of fæces.