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A thing (only in phrase below). Rule of Coss, an old name for Algebra. Etym: [It. regola di cosa rule of thing, the unknown quantity being called the cosa, or the thing.]

One of a warlike, pastoral people, skillful as horsemen, inhabiting different parts of the Russian empire and furnishing valuable contingents of irregular cavalry to its armies, those of Little Russia and those of the Don forming the principal divisions.

An outpost consisting of four men, forming one of a single line of posts substituted for the more formal line of sentinels and line of pickets.

Plain India muslin, of various qualities and widths.

To treat as a pet; to fondle. She was cosseted and posseted and prayed over and made much of. O. W. Holmes.

One of the small chips or slices into which beets are cut in sugar making.

Of or relating to algebra; as, cossic numbers, or the cossic art. [Obs.] "Art of numbers cossical." Digges (1579).

A dancing tune in the Scotch style.

A hetman, or chief of the Cossacks.

par; lazulite. See Lazulite. -- Blue thrush (Zoöl.), a European and Asiatic thrush (Petrocossyphus cyaneas). -- Blue verditer. See Verditer. -- Blue vitriol (Chem.), sulphate of copper, a violet blue crystallized salt, used in electric batteries, calico printing, etc. -- Blue water, the open ocean. -- To look blue…

A Cossack headman or general. The title of chief hetman is now held by the heir to the throne of Russia.

Same as Cossack.

To treat with possets; to pamper. [R.] "She was cosseted and posseted." O. W. Holmes.

petroleum. -- Rock thrush (Zoöl.), any Old World thrush of the genus Monticola, or Petrocossyphus; as, the European rock thrush (M. saxatilis), and the blue rock thrush of India (M. cyaneus), in which the male is blue throughout. -- Rock tripe (Bot.), a kind of lichen (Umbilicaria Dillenii) growing on rocks in the n…

e polka, only slower; also, the music for such a dance; -- not to be confounded with the Écossaise.