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A large genus of composite plants, related to the thistles and including the cornflower or bluebottle (Centaurea Cyanus) and the star thistle (C. Calcitrapa).

rfoliata of Europe, but is also extended to the whole genus Sabbatia, and even to the unrelated Centaurea.

Behavior regulated by strict etiquette; a formal method of performing acts of civility; forms of civility prescribed by custom or authority. Ceremony was but devised at first To set a gloss on . . . hollow welcomes . . . But where there is true friendship there needs none. Shak. Al ceremonies are in themselves very sil…

A shark of the genus Cestracion, and of related genera. The posterior teeth form a pavement of bony plates for crushing shellfish. Most of the species are extinct. The Port Jackson shark and a similar one found in California are living examples.

A radical, C16H33, not yet isolated, but supposed to exist in a series of compounds homologous with the ethyl compounds, and derived from spermaceti.

t of unknown or unconsidered forces; the issue of uncertain conditions; an event not calculated upon; an unexpected occurrence; a happening; accident; fortuity; casualty. It was a chance that happened to us. 1 Sam. vi. 9. The Knave of Diamonds tries his wily arts, And wins (O shameful chance!) the Queen of Hearts. Pope…

A genus of flowerless plants, having articulated stems and whorled branches. They flourish in wet places.

The curd of milk, coagulated usually with rennet, separated from the whey, and pressed into a solid mass in a hoop or mold.

A warlike tribe of indians, related to the blackfeet, formerly inhabiting the region of Wyoming, but now mostly on reservations in the Indian Territory. They are noted for their horsemanship.

A variety of andalusite; -- called also macle. The tesselated apperance of a cross section is due to the symmetrical arrangement of impurities in the crystal.

Related to, or like, the chimæra.

One of the elementary substances, commonly isolated as a greenish yellow gas, two and one half times as heavy as air, of an intensely disagreeable suffocating odor, and exceedingly poisonous. It is abundant in nature, the most important compound being common salt. It is powerful oxidizing, bleaching, and disinfecting a…

occurring most abundantly in the mineral chromite. Atomic weight 52.5. Symbol Cr. When isolated it is a hard, brittle, grayish white metal, fusible with difficulty. Its chief commercial importance is for its compounds, as potassium chromate, lead chromate, etc., which are brilliantly colored and are used dyeing and cal…

A lively dance (called also galliard), the steps of which were regulated by the number five. [Obs.] Nares. Shak.

That may be circulated.

Addressed to a circle, or to a number of persons having a common interest; circulated, or intended for circulation; as, a circular letter. A proclamation of Henry III., . . . doubtless circular throughout England. Hallam.

The extent to which anything circulates or is circulated; the measure of diffusion; as, the circulation of a newspaper.

Varicose. Cirsoid aneurism, a disease of an artery in which it becomes dilated and elongated, like a varicose vein.

e food fish of the Great Lakes of North America. The name is also applied to C. Hoyi, a related species of Lake Michigan.

An apparatus consisting of a slowly revolving disk, usually regulated by clockwork, by means of wich the action of external agents, as light and gravity, on growing plants may be regulated or eliminated.