See Water brash, under Brash.

A mineral, usually of a pale brown or of a gray or grayish green color, consisting chiefly of the hydrous silicate of iron and manganese; -- so called from the odor given off before the blowpipe.

Any compound ascidian of the genus Pyrosoma. The pyrosomes form large hollow cylinders, sometimes two or three feet long, which swim at the surface of the sea and are very phosphorescent.

A salt of pyrosulphuric acid.

Pertaining to, or designating, an acid called also disulphuric acid) obtained by distillation of certain sulphates, as a colorless, thick, oily liquid, H2S2O7 resembling sulphuric acid. It is used in the solution of indigo, in the manufacture of alizarin, and in dehydration.

Pertaining to, or designating, an acid obtained as a white crystalline substance by the distillation of tartaric acid.

A salt of pyrotartaric acid.

A pyrotechnist.

Of or pertaining to fireworks, or the art of forming them.

A pyrotechnist.

The art of making fireworks; the manufacture and use of fireworks; pyrotechny.

One skilled in pyrotechny; one who manufactures fireworks.

The use and application of fire in science and the arts.

A kind of empyreumatic oil produced by the combustion of textures of hemp, linen, or cotton in a copper vessel, -- formerly used as a remedial agent.

Caustic. See Caustic. A caustic medicine.

Designating an acid which is more commonly called uric acid.

Polytungstic. See Metatungstic.

Pertaining to, or designating, an acid now called cyanuric acid. See Cyanuric.

Pertaining to, or designating, an acid of vanadium, analogous to pyrophosphoric acid.

A yellow crystalline hydrocardon extracted from crude wood spirit; -- called also eblanin.

A common mineral occurring in monoclinic crystals, with a prismatic angle of nearly 90/, and also in massive forms which are often laminated. It varies in color from white to dark green and black, and includes many varieties differing in color and composition, as diopside, malacolite, salite, coccolite, augite, etc. They are all silicates of lime and magnesia with sometimes alumina and iron. Pyroxene is an essential constituent of many rocks, especially basic igneous rocks, as basalt, gabbro, etc.

Containing pyroxene; composed chiefly of pyroxene.

A rock consisting essentially of pyroxene.

Derived from wood by distillation; -- formerly used in designating crude wood spirit.

A substance resembling gun cotton in composition and properties, but distinct in that it is more highly nitrified and is soluble in alcohol, ether, etc.; -- called also pyroxyle.

An ancient Greek martial dance, to the accompaniment of the flute, its time being very quick.

One two danced the pyrrhic.

Of or pertaining to pyrrhonism.

Skepticism; universal doubt.

A follower of Pyrrho; a skeptic.

A bronze-colored mineral, of metallic luster. It is a sulphide of iron, and is remarkable for being attracted by the magnet. Called also magnetic pyrites.

A nitrogenous heterocyclic base found in coal tar, bone oil, and other distillates of organic substances, and also produced synthetically as a colorless liquid, C4H5N, having on odor like that of chloroform. It is the nucleus and origin of a large number of derivatives. So called because it colors a splinter of wood moistened with hydrochloric acid a deep red.

A nitrogenous base, C4H7N, obtained as a colorless liquid by the reduction of pyrrole.

A genus of large marine gastropods having a pear-shaped shell. It includes the fig-shells. See Illust. in Appendix.

Same as Pyro/ric.

A genus of rosaceous trees and shrubs having pomes for fruit. It includes the apple, crab apple, pear, chokeberry, sorb, and mountain ash.

Pertaining to, or designating, an acid (called also pyroracemic acid) obtained, as a liquid having a pungent odor, by the distillation of racemic acid.

A complex nitrogenous compound obtained by heating together pyruvic acid and urea.

A follower of Pythagoras; one of the school of philosophers founded by Pythagoras.

The doctrines of Pythagoras or the Pythagoreans.

See Pythagorean, a.

The doctrines taught by Pythagoras.

To speculate after the manner of Pythagoras.

The period intervening between one celebration of the Pythian games and the next.

Of or pertaining to Delphi, to the temple of Apollo, or to the priestess of Apollo, who delivered oracles at Delphi.

Producing decomposition, as diseases which are supposed to be accompanied or caused by decomposition.

Any species of very large snakes of the genus Python, and allied genera, of the family Pythonid/. They are nearly allied to the boas. Called also rock snake.

The priestess who gave oracular answers at Delphi in Greece.

Prophetic; oracular; pretending to foretell events.

The art of predicting events after the manner of the priestess of Apollo at Delphi; equivocal prophesying.

A conjurer; a diviner.

Same as Mosasauria.

A morbid condition in which pus is discharged in the urine.

To test as to weight and fineness, as the coins deposited in the pyx.

Having a pyxidium.

A pod which divides circularly into an upper and lower half, of which the former acts as a kind of lid, as in the pimpernel and purslane. The theca of mosses.

Same as Pixy.

A box; a pyx.

Quality control.

Quantum chromodynamics.

Quantum electrodynamics.

In so far as; in the capacity or character of; as.

The American night heron. See under Night.

See Quob, v. i.

The quagga.

Pertaining to or characterized by, boasting and pretension; used by quacks; pretending to cure diseases; as, a quack medicine; a quack doctor.

The acts, arts, or boastful pretensions of a quack; false pretensions to any art; empiricism.

Like a quack; boasting; characterized by quackery.

Quackery.

To suffocate; to choke.

One who boasts of his skill in medicines and salves, or of the efficacy of his prescriptions; a charlatan; a quack; a mountebank.

A quadrangle; hence, a prison.

Evil; bad; baffling; as, a quade wind.

The plinth, or lowest member, of any pedestal, podium, water table, or the like. A fillet, or listel.

That may be sqyared, or reduced to an equivalent square; -- said of a surface when the area limited by a curve can be exactly found, and expressed in a finite number of algebraic terms.

Consisting of forty; forty years old.

An indulgence of forty days, corresponding to the forty days of ancient canonical penance.

The forty days of fast preceding Easter; Lent.

Belonging to Lent; used in Lent; Lenten.

Offerings formerly made to the mother church of a diocese on Mid-Lent Sunday.

Having four angles, and consequently four sides; tetragonal.

A fourth part of the coin called an as. See 3d As, 2.

The fourth part; the quarter.

A cubical vessel containing a Roman cubic foot, each side being a Roman square foot; -- used as a measure.

A block of type metal lower than the letters, -- used in spacing and in blank lines.

To adjust (a gun) on its carriage; also, to train (a gun) for horizontal firing.

That branch of algebra which treats of quadratic equations.

Of or pertaining to the quadrate and jugal bones. Of or pertaining to the quadratojugal bone. The quadratojugal bone.

A curve made use of in the quadrature of other curves; as the quadratrix, of Dinostratus, or of Tschirnhausen.

The act of squaring; the finding of a square having the same area as some given curvilinear figure; as, the quadrature of a circle; the operation of finding an expression for the area of a figure bounded wholly or in part by a curved line, as by a curve, two ordinates, and the axis of abscissas.

A square piece of turf or peat.

Comprising four years; as, a quadrennial period.

Once in four years.

A space or period of four years.

Same as Tetrabasic.

Quadrable.

A quantic of the second degree. See Quantic. A surface whose equation in three variables is of the second degree. Spheres, spheroids, ellipsoids, paraboloids, hyperboloids, also cones and cylinders with circular bases, are quadrics.

Having four capsules.

The great extensor muscle of the knee, divided above into four parts which unite in a single tendon at the knee.

Of or pertaining to the quadriceps.

Any quadricornous animal.

Having four horns, or hornlike organs; as, a quadricornous beetle.

Having four ribs.

Having four teeth; as, a quadridentate leaf.

Same as Quadrennial.

Arranged in four rows or ranks; as, quadrifarious leaves.

Divided, or deeply cleft, into four parts; as, a quadrifid perianth; a quadrifid leaf.

Four-leaved; having the leaves in whorls of four.

Having four forks, or branches.

A car or chariot drawn by four horses abreast.

Fourfold; having four similar parts, or two pairs of similar parts.

Consisting of four hundred.

Same as Quadrijugous.

Pinnate, with four pairs of leaflets; as, a quadrijugous leaf.

A plane figure having four sides, and consequently four angles; a quadrangular figure; any figure formed by four lines.

The property of being quadrilateral.

Consisting of four letters.

A game played by four persons with forty cards, being the remainder of an ordinary pack after the tens, nines, and eights are discarded.

According to the French notation, which is followed also upon the Continent and in the United States, a unit with fifteen ciphers annexed; according to the English notation, the number produced by involving a million to the fourth power, or the number represented by a unit with twenty-four ciphers annexed. See the Note under Numeration.

Having four lobes; as, a quadrilobate leaf.