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]
An actual island in the Columbia River, which separates Portland, Ore., from Vancouver, Wash. Oregon claims Hayden Island, but the man it's named after, Gay Hayden, mostly owned property in Vancouver, not Portland. He owned most of Hayden Island, too, and lived in a fancy house there.