a hard ferromagnetic silver- white bivalent or trivalent metallic element; a trace element in plant and animal nutrition

a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in photosynthesis

an odorless very poisonous gas that is a product of incomplete combustion of carbon

a state in west central United States in the Rocky Mountains

one who refuses to serve in the armed forces on grounds of conscience

A form of the prefix com-, signifying with, together, in conjunction, joint. It is used before vowels and some consonants. See Com-.

With; together See COM-. Co is often joined to purely English words; as, comate, copartner, corespondent ( distinguished from correspondent).

A prefix of Latin origin; ao abbreviation for company. See Con.

A form of the prefix con, and means, with; together; together with; co is used before a vowel and h, as coalesce, cohabit, and is often separated from the word by a hyphen, as co- operate, co- partner; in math., co is an abbreviation of complement, as co- latitude, co- sine, co- tangent. Note.- The prefix con assumes the various forms of co, cog, col, com, cor, according to the first letter of the second element of the compound; but, 1, con becomes com before b and p, as combustion, compel; 2, con is retained before j and v, except in comfort, as conflict, convene; 3, con is retained before t, d, q, g, and s, as content, condole, conquest, congeal, consent.

It requires a definite co- operation with business. – The War After the War by Isaac Frederick Marcosson

Others admit, at least, a co- reference to the prophet the Lord. – Christology of the Old Testament: And a Commentary on the Messianic Predictions, v. 1 by Ernst Wilhelm Hengstenberg

The agents will be along about then- Sauers and Co. – Mr. Trunnell by T. Jenkins Hains

Look at your Co- Citizens now. – The Co-Citizens by Corra Harris

May I rely on your co- operation? – The Old Man in the Corner by Baroness Orczy

Towards the close of autumn, he again left the Maumee; and, followed by four hundred warriors, journeyed westward, to visit in succession the different tribes, and gain their co- operation in his plans of final defence. – The Conspiracy of Pontiac and the Indian War after the Conquest of Canada by Francis Parkman

London, Longmans, Green and Co. – Studies in Literature and History by Sir Alfred Comyn Lyall

He was by himself, Sequence and the " Co." – Caught in a Trap by John C. Hutcheson

This knowledge enabled him to keep up more than the show of co- operation with the French in matters which concerned the welfare of the people. – The Hour and the Man An Historical Romance by Harriet Martineau

Fisse, Thirion, and Co. – Facts About Champagne and Other Sparkling Wines by Henry Vizetelly

They would ask him who the Co. – In the Days When the World Was Wide and Other Verses by Henry Lawson

" I only ask your co- operation," he returned confidently. – The Stronger Influence by F.E. Mills Young

He succeeded, however, in getting the active aid and co- operation of Messrs. – The-Life-of-Phineas-T-Barnum by Benton, Joel

Is the Cascade Development and Securities Co. – The Danger Mark by Robert W. Chambers

It holds back something until all parts are co- ordinated and " does the thing shall breed the thought." – Browning and the Dramatic Monologue by S. S. Curry

" But-" " Thanks for your co- operation, lieutenant," Malone said. – Out Like a Light by Gordon Randall Garrett

When, however, Percy and Co. – The Cock-House at Fellsgarth by Talbot Baines Reed

This inventory was taken without the co- operation of the padre, who refused to sign it. – The Old Franciscan Missions Of California by George Wharton James

Mr. Bond, of the firm of Gillows and Co. – The Bushman Life in a New Country by Edward Wilson Landor

The attack was not properly conducted owing to a jealousy amongst some of the generals, and there was not proper co- operation. – My Reminiscences of the Anglo-Boer War by Ben Viljoen