[{"Bold_text": "noun", "List Items": ["any remains, impression, or trace of a living thing of a former geologic age, as a skeleton, footprint, etc.", "a markedly outdated or old-fashioned person or thing.", "a linguistic form that is archaic except in certain restricted contexts, asnonceinfor the nonce,or that follows a rule or pattern that is no longer productive, as the sentence So be it."]}, {"Bold_text": "adjective", "List Items": ["of the nature of a fossil:fossil insects.", "belonging to a past epoch or discarded system; antiquated:a fossil approach to economics."]}]