Archeometry
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the branch of archaeology that deals with the dating of archaeological specimens through specific techniques, as radiocarbon dating and amino-acid dating.
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- Archeozoic
noting or pertaining to the earlier half of the precambrian era, from about 5 billion to 2.5 billion years ago, during which the earliest datable rocks were formed and from which the oldest known fossil forms, blue-green algae and bacteria, have been recovered. the archeozoic division of geologic time or the rock systems formed then. […]
- Archeptolemus
(in the iliad) the son of iphitus who served as a charioteer for hector.
- Archerfish
a small , toxotes jaculatrix, of brackish and fresh waters in southeastern asia, that preys upon sh-r-side spiders and insects by spitting drops of water at them and knocking them into the water. any of several closely related of the family toxotidae. noun (pl) -fish, -fishes any freshwater percoid fish of the family toxotidae of […]
- Arches
architecture. a curved masonry construction for spanning an opening, consisting of a number of wedgelike stones, bricks, or the like, set with the narrower side toward the opening in such a way that forces on the arch are transmitted as vertical or oblique stresses on either side of the opening. an upwardly curved construction, as […]
- Arches national park
a national park in e utah: natural arch formations. 114 sq. mi. (295 sq. km).