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A blue, fluorescent, oily base (regarded as a derivative of pyridine), obtained from conine.

string, used to secure a mantle in some costumes of state. Cordon bleu (kd" bl Etym: [F., blue cordon], a first-rate cook, or one worthy to be the cook of the cordons bleus, or Knights of the Holy Ghost, famous for their good dinners. -- Cordon sanitaire (kd" s Etym: [F., sanitary cordon], a line of troops or military…

or a caustic alkali. Aqua fortis corroding copper . . . is wont to reduce it to a green- blue solution. Boyle.

th alumina, as found native in a crystalline state, including sapphire, which is the fine blue variety; the oriental ruby, or red sapphire; the oriental amethyst, or purple sapphire; and adamantine spar, the hair-brown variety. It is the hardest substance found native, next to the diamond.

A native sulphide of copper, occuring in masses of a dark blue color; -- hence called indigo copper.

society; to shut out from social intercourse, as for ungentlemanly conduct. -- Coventry blue, blue thread of a superior dye, made at Coventry, England, and used for embroidery.

A deep red color tinged with blue; also, red color in general. Theugh jour be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool. Is. i. 18. A maid jet rosed over with the virgin crimson of modesty. Shak.

A mineral occuring in silky fibers of a lavender blue color. It is related to hornblende and is essentially a silicate of iron and soda; -- called also blue asbestus. A silicified form, in which the fibers penetrating quartz are changed to oxide of iron, is the yellow brown tiger-eye of the jewelers.…

Anything resembling crystal, as clear water, etc. The blue crystal of the seas. Byron. Blood crystal. See under Blood. -- Compound crystal. See under Compound. -- Iceland crystal, a transparent variety of calcite, or crystallized calcium carbonate, brought from Iceland, and used in certain optical instruments, as the…

Having the edges toward the base rolled inward, as the leaf of the commonest American blue violet.

An English meadow plant, perhaps the columbine or the bluebell squill (Scilla nutans). [Obs.] A girl cropping culverkeys and cowslips to make garlands. Walton.

ible fish of the Atlantic coast (Ctenolabrus adspersus); -- called also chogset, burgall, blue perch, and bait stealer. [Written also conner.]

se in potatoes, in which the leaves, at their first appearance, seem curled and shrunken. Blue curls. (Bot.) See under Blue.

Of or pertaining to a blue color. Cyanic acid (Chem.), an acid, HOCN, derived from cyanogen, well known in its salts, but never isolated in the free state. -- Cyanic colors (Bot.), those colors (of flowers) having some tinge of blue; -- opposed to xanthic colors. A color of either series may pass into red or white, bu…

The blue coloring matter of flowers; -- called also anthokyan and anthocyanin.

One of a series of artificial blue or red dyes obtained from quinoline and lepidine and used in calico printing.

A mineral occuring in thin-bladed crystals and crystalline aggregates, of a sky-blue color. It is a silicate of aluminium. [Written also kyanite.]

ble, poisonous gas, C2N2, with a peach- blossom odor, so called from its tendency to form blue compounds; obtained by heating ammonium oxalate, mercuric cyanide, etc. It is obtained in combination, forming an alkaline cyanide when nitrogen or a nitrogenous compound is strongly ignited with carbon and soda or potash. It…

An instrument for measuring degress of blueness.

A disease in which the body is colored blue in its surface, arising usually from a malformation of the heart, which causes an imperfect arterialization of the blood; blue jaundice.