Arch support
a rigid support placed inside a shoe so that its molded form fits the arch of the foot and relieves strain on the muscles of the foot while walking, standing, etc.
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- Archway
an entrance or passage under an . a covering or enclosing arch. Contemporary Examples Small children clambered on top of an archway surrounding the cemetery to watch the proceedings. America’s Islamist Allies in Libya Babak Dehghanpisheh April 8, 2011 My mother leaned into the archway while resting Ted on her hip, and let out a […]
- Archaean
. noting or pertaining to rocks of the Archeozoic portion of the Precambrian Era. Historical Examples This place is about five hundred yards west of the bridge in an alcove in the Archaean Rock which forms the Canyon wall. I Married a Ranger Dama Margaret Smith Directly or indirectly, the fish is a descendant of […]
- Archaebacteria
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 ancient form of life that evolved separately from the bacteria and blue-green algae and sometimes classified as a kingdom. plural noun (formerly) […]
- Archaeo-
a combining form meaning “ancient,” used in the formation of compound words: archaeopteryx; archaeology. combining form indicating ancient or primitive time or condition: archaeology, archaeopteryx of, involving, or denoting the study of remains from archaeological sites: archaeozoology before vowels archae-, word-forming element meaning “ancient, olden, primitive, primeval, from the beginning,” from Latinized form of Greek […]
- Archaeoastronomy
the branch of archaeology that deals with the apparent use by prehistoric civilizations of astronomical techniques to establish the seasons or the cycle of the year, especially as evidenced in the construction of megaliths and other ritual structures. noun the scientific study of the beliefs and practices concerning astronomy that existed in ancient and prehistoric […]