co
noun()
a state in west central United States in the Rocky Mountains
co
noun()
a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition
Synonyms: atomic number 27,
cobalt,
co
noun()
an odorless very poisonous gas that is a product of incomplete combustion of carbon
Synonyms: carbon monoxide, carbon monoxide gas,
co
noun()
one who refuses to serve in the armed forces on grounds of conscience
Synonyms: conscientious objector,