[{"Bold_text": "adjective", "List Items": ["Geology.noting or pertaining to a period of the Paleozoic Era, 405 to 345 million years ago, characterized by the dominance of fishes and the advent of amphibians and ammonites.", "of or relating to Devonshire, England."]}, {"Bold_text": "noun", "List Items": ["Geology.the Devonian Period or System."]}]