Search the Dictionary

A soft earth, which is plastuc, or may be molded with the hands, consisting of hydrous silicate of alumunium. It is the result of the wearing down and decomposition, in part, of rocks containing aluminous minerals, as granite. Lime, magnesia, oxide of iron, and other ingredients, are often present as impurities.…

h, etc. It is a complex mixture from which many substances have been obtained, especially hydrocarbons of the benzene or aromatic series.

A bureau of the United States government charged with the topographic and hydrographic survey of the coast and the execution of belts of primary triangulation and lines of precise leveling in the interior. It now belongs to the Department of Commerce and Labor.

wer valence. Cobaltous chloride, a crystalline compound, CoCl2, of a pale rose color when hydrous, blue when dehydrated. Its solution is used for a sympathetic ink, the writing being nearly colorless when dried in the air, owing to absorbed moisture, and becoming bright blue when warmed.

A comprehensive group of Invertebrata, mostly marine, comprising the Anthozoa, Hydrozoa, and Ctenophora. The name implies that the stomach and body cavities are one. The group is sometimes enlarged so as to include the sponges.

The common soft tissue which unites the polyps of a compound hydroid. See Hydroidea.

A hydrous borate of lime occurring in transparent colorless or white crystals, also massive, in Southern California.

the card played. Combining weight (Chem.), that proportional weight, usually referred to hydrogen as a standard, and for each element fixed and exact, by which an element unites with another to form a distinct compound. The combining weights either are identical with, or are multiples or multiples of, the atomic weigh…

word composed of two or more words; specifically, two or more words joined together by a hyphen.

hich asserts the dependence of one categorical proposition on another. Whately. The words hypothetical and conditional may be . . . used synonymously. J. S. Mill.

Containing an unnatural accumulation of blood; hyperæmic; -- said of any part of the body.

od vessels, etc., in any locality or organ (often producing other morbid symptoms); local hyperas, arterial congestion; venous congestion; congestion of the lungs.

he surface of a right cone and a plane. The conic sections are the parabola, ellipse, and hyperbola. The right lines and the circle which result from certain positions of the plane are sometimes, though not generally included. -- Conic sections, that branch of geometry which treats of the parabola, ellipse, and hyperb…

s with reference to two quantities, points, lines, axes, curves, etc. Conjugate axis of a hyperbola (Math.), the line through the center of the curve, perpendicular to the line through the two foci. -- Conjugate diameters (Conic Sections), two diameters of an ellipse or hyperbola such that each bisects all chords draw…

ubstance flowing spontaneously from trees of Zanzibar, Madagascar, and South America (Trachylobium Hornemannianum, T. verrocosum, and Hymenæa Courbaril), and dug from earth where forests have stood in Africa; -- used chiefly in making varnishes. Ur

The hard parts or skeleton of various Anthozoa, and of a few Hydrozoa. Similar structures are also formed by some Bryozoa.

Energy wasted by hysteresis or eddy currents in the core of an armature, transformer, etc.

tive in the formation of the world independently of God; world-forming. "Cosmoplastic and hylozoic atheisms." Gudworth.

Assuming the appearance of something; false; spurious; deceitful; hypocritical; as, a counterfeit philanthropist. "An arrant counterfeit rascal." Shak.

ails or beams fixed overhead, as in a machine shop or foundry. -- Water crane, a kind of hydrant with a long swinging spout, for filling locomotive tenders, water carts, etc., with water.