plural of hyoid arch

plural of pelvic arch

plural of jack arch

A black-and-white species of moth, Lymantria monacha.

plural of black-arched moth

(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.

Misspelling of archaeological.

(ecclesiastical) In certain Catholic (notably Benedictine) congregations, the title of the general superior, ranking above all other abbots, vested in a particular abbey, which hence is called an archabbey (usually its motherhouse, such as Beuron, which gave its name to a Benedictine congregation).

ancient, early, primitive

(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.