Cooper, kōōp′ėr, n. a floating grog-shop.—v.i. to supply fishing-boats at sea with liquor. [See Coper.]

Co-operate, kō-op′ėr-āt, v.i. to work together.—n. Co-operā′tion, joint operation; the association of a number of persons for the cheaper purchasing of goods, or for carrying on some branch of industry.—adjs. Co-op′erātive, Co-op′erant, working together.—n. Co-op′erātor.—Co-operating grace (theol.), the R.C., Arminian, and Socinian doctrine that the human will co-operates with the divine in the matter of saving grace. [Co-, together, and Operate.]

Co-opt, kō-opt′, v.t. to elect into any body by the votes of its members.—ns. Co-optā′tion, Co-op′tion.—adj. Co-op′tative. [L. cooptāre, -ātumco-, together, optāre, to choose.]

Co-ordinate, kō-or′di-nāt, adj. holding the same order or rank.—v.t. to make co-ordinate.—n. a co-ordinate element: each of a system of two or more magnitudes used to define the position of a point, line, or plane, by reference to a fixed system of lines, points, &c.—n. Co-or′dinance, a joint ordinance.—adv. Co-or′dinately.—ns. Co-or′dinateness, the state of being co-ordinate: equality of rank, &c.; Co-ordinā′tion, state of being co-ordinate.—adj. Co-or′dinative, indicating co-ordination.

Coost, küst, a Scotch form of Cast.

Coot, kōōt, n. a short-tailed water-fowl, with a characteristic white spot—an extension of the bill—on the forehead; hence called bald, as in phrase, 'bald as a coot.' [M. E. cote; cf. Dut. koet.]

Coot, küt, n. (Scot.) the ankle.—adj. Coot′ie, having legs clad with feathers. [Scot.; cf. Dut. koot; Flem. keute.]

Cop, kop, n. a conical ball of thread on a spindle—also Cop′pin: (obs.) a top or head of anything.—adj. Copped, rising to a cop or head. [A.S. cop, copp.]

Cop, kop, v.t. (slang) to capture.—ns. Cop, Cop′per (slang), a policeman.

Copaiba, ko-pā′ba, n. a balsam obtained from an American tree, much used in medicine.—Also Copai′va. [Sp.,—Braz.]