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Impure limestone. [Prov. Eng.] Wright.

The second crust formed in port and some other wines after long keeping. It consists of pure, shining scales of tartar, supposed to resemble the wing of a bee.

h it is separated by fractional distillation. The name is sometimes applied also to the impure commercial product or benzole, and also, but rarely, to a similar mixed product of petroleum. Benzene nucleus, Benzene ring (Chem.), a closed chain or ring, consisting of six carbon atoms, each with one hydrogen atom attached…

An impure benzene, used in the arts as a solvent, and for various other purposes. See Benzene.

Having pure blood, or a large admixture or pure blood; of approved breed; of the best stock.

e, C16H14O5, extracted from brazilwood as a yellow crystalline powder which is white when pure. It is colored intensely red by alkalies on exposure to the air, being oxidized to bra*sil"e*in, C16H12O5, to which brazilwood owes its dyeing properties.

an wood, from which it is extracted as a yellow crystalline substance which is white when pure. It is colored intensely red by alkalies. [Written also brezilin.]

l; to make sure; to guarantee or warrant. [Obs.] Thy presence broadseals our delights for pure. B. Jonson.

d upon a burning scent. Dryden. Burning bush (Bot.), an ornamental shrub (Euonymus atropurpureus), bearing a crimson berry.

Caballine aloes. Caballine aloes, an inferior and impure kind of aloes formerly used in veterinary practice; -- called also horse aloes. -- Caballine spring, the fountain of Hippocrene, on Mount Helicon; - - fabled to have been formed by a stroke from the foot of the winged horse Pegasus.

and sinless peace." Milton. "With calm attention." Pope. Such calm old age as conscience pure And self-commanding hearts ensure. Keble.

ntation; slander; detraction. "Infamouse calumnies." Motley. Be thou as chaste as ice, as pure as snow, thou shalt not escape calumny. Shak.

d forms the base of lampblack and charcoal, and enters largely into mineral coals. In its pure crystallized state it constitutes the diamond, the hardest of known substances, occuring in monometric crystals like the octahedron, etc. Another modification is graphite, or blacklead, and in this it is soft, and occurs in h…

A brown pigment of varying permanence, consisting of impure lignite. It was found originally near Cassel (now Kassel), Germany.

A substance composed essentially of gun cotton and camphor, and when pure resembling ivory in texture and color, but variously colored to imitate coral, tortoise shell, amber, malachite, etc. It is used in the manufacture of jewelry and many small articles, as combs, brushes, collars, and cuffs; -- originaly called xyl…

starch, and is convertible into starches and sugars by the action of heat and acids. When pure, it is a white amorphous mass. See Starch, Granulose, Lignin. Unsized, well bleached linen paper is merely pure cellulose. Goodale. Starch cellulose, the delicate framework which remains when the soluble part (granulose) of s…

seat and some external characters, but differing from it in being the starting point of a purely local process and never of a systemic disease; -- called also soft chancre.

Impure carbon prepared from vegetable or animal substances; esp., coal made by charring wood in a kiln, retort, etc., from which air is excluded. It is used for fuel and in various mechanical, artistic, and chemical processes.

Pure from unlawful sexual intercourse; virtuous; continent. "As chaste as Diana." Shak. Whose bed is undefiled and chaste pronounced. Milton.

Wheat, or bread made from wheat. [Obs.] Drayton. Their purest cheat, Thrice bolted, kneaded, and subdued in paste. Chapman.