| n. | 1. | the chemical formula for cobalt, a ferromagnetic metal of atomic number 27. |
| Noun | 1. | CO - an odorless very poisonous gas that is a product of incomplete combustion of carbon Synonyms: carbon monoxide, carbon monoxide gas |
| 2. | Co - a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition Synonyms: atomic number 27, cobalt | |
| 3. | CO - one who refuses to serve in the armed forces on grounds of conscience Synonyms: conscientious objector | |
| 4. | CO - a state in west central United States in the Rocky Mountains Synonyms: Centennial State, Colorado |
CO. A prefix or particle in the nature of an inseparable proposition, signifying with or in conjunction. Con and the Latin cum are equivalent, as, co-executors, co-obligor. It is also used as an abbreviation for company as, John Smith & Co.
| (networking) | co - The country code for Colombia. |