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An impure, massive, flintlike quartz or hornstone, of a dull color.

An impure aqueous solution of chloride of aluminium, used as an antiseptic and disinfectant.

des of cobalt and zinc subjected to the action of fire. -- Hepatic cinnabar (Min.), an impure cinnabar of a liver-brown color and submetallic luster.

Conforming to the best authority in literature and art; chaste; pure; refined; as, a classical style. Classical, provincial, and national synods. Macaulay. Classicals orders. (Arch.) See under Order.

r an alkali, and therefore infusible, and used for fire brick. -- Porcelain clay, a very pure variety, formed directly from the decomposition of feldspar, and often called kaolin. -- Potter's clay, a tolerably pure kind, free from iron.

Free from moral defilement; sinless; pure. Create in me a clean heart, O God. Ps. li. 10 That I am whole, and clean, and meet for Heaven Tennyson.

Habitually clean; pure; innocent. "Cleanly joys." Glanvill. Some plain but cleanly country maid. Dryden. Displays her cleanly platter on the board. Goldsmith.

paqueness; transparent; bright; light; luminous; unclouded. The stream is so transparent, pure, and clear. Denham. Fair as the moon, clear as the sun. Canticles vi. 10.

series of complex red compounds of cobalt and ammonia. Modifications of these are the purpureo-cobaltic compounds.

A horse, not of pure breed, but having only one eighth or one sixteenth impure blood in his veins. Darwin.

A very pure form of gelatin.

rd of sounds; harmony; as, a concent of notes. [Archaic.] Bacon. That undisturbed song of pure concent. Milton.

senting themselves simultaneously and having reciprocal properties; -- frequently used in pure and applied mathematics 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. --…

Debauched in character or practice; impure. Milton.

To have corrosive action; to be subject to corrosion. Corroding lead, lead sufficiently pure to be used in making white lead by a process of corroding.

To debase or render impure by alterations or innovations; to falsify; as, to corrupt language; to corrupt the sacred text. He that makes an ill use of it [language], though he does not corrupt the fountains of knowledge, . . . yet he stops the pines. Locke.

The act of changing, or of being changed, for the worse; departure from what is pure, simple, or correct; as, a corruption of style; corruption in language. Corruption of blood (Law), taint or impurity of blood, in consequence of an act of attainder of treason or felony, by which a person is disabled from inheriting an…

A fixed, semidrying oil extracted from cottonseed. It is pale yellow when pure (sp. gr., .92-.93). and is extensively used in soap making, in cookery, and as an adulterant of other oils.

Wood-tar oil; an oily antiseptic liquid, of a burning smoky taste, colorless when pure, but usually colored yellow or brown by impurity or exposure. It is a complex mixture of various phenols and their ethers, and is obtained by the distillation of wood tar, especially that of beechwood.

metaphysical system of Kant; -- so called from his most important work, the "Critique of Pure Reason." - - Critical point (Physics), a certain temperature, different for different gases, but always the same for each gas, regarded as the limit above which no amount of pressure can produce condensation to a liquid.…