plural of archaeon

(astronomy, archaeology) The historical, especially archeological, study of astronomy; the study of the astronomical systems and methods of ancient cultures often embracing the astrology and cosmology of the past.

(geology) Of, or relating to the geologic eon from about 3,800 to 2,500 million years ago; comprises the Eoarchean, Paleoarchean, Mesoarchean and Neoarchean eras; marked by an atmosphere with little oxygen, the formation of the first continents and oceans and the emergence of simple life.

(geology) The eon from 2,500 Ma to 4,000 Ma.

(biology) Any organism of the domain Archaea.

(microbiology) Relating to the archaea

That kills microorganisms of the domain Archaea

plural of archaean