Hamilton period
Ham´il`ton pe´ri`od
(hăm´ĭl`tŭn pē´rĭ`ŭd)| 1. | (Geol.) A subdivision of the Devonian system of America; - so named from Hamilton, Madison Co., New York. It includes the Marcellus, Hamilton, and Genesee epochs or groups. See the Chart of Geology. |