Of or relating to the replacement of three of several atoms or groups in a compound, such as an amine in which three valences of the functional group are taken by carbon atoms. c. Of or relating to salts of acids containing three replaceable hydrogen atoms.
Hayden is a town in Blount County, Alabama, United States. At the 2010 census the population was 444.[3]
The county is traversed by the Alabama River, flowing from northeast to southwest across the county. It is bordered by Perry, Chilton, Autauga, Lowndes, Wilcox, and Marengo counties. Originally, the Dallas county seat was at Cahaba, which also served as the state capital for a brief period. In 1865, the county seat was transferred to Selma. Other towns and communities in the still mostly rural county include Marion Junction, Sardis, Orrville, Valley Grande, and Minter.