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]
HDN Airport is located near Hayden, in Routt County, Colorado (off Highway 40, on County Road 51A) - and is approximately 22 miles west of Steamboat Springs,.