[{"Bold_text": "plural noun", "List Items": ["a group of microorganisms, including the methanogens and certain halophiles and thermoacidophiles, that have RNA sequences, coenzymes, and a cell wall composition that are different from all other organisms: considered to be an form of life that evolved separately from bacteria and algae and classified as constituting the domain Archaea."]}, {"Bold_text": "noun", "List Items": ["(in the three-domain system of classification) the taxonomic domain comprising the archaea ."]}]