(View exact match)radiateCATEGORY: artifact
DEFINITION: An imperial Roman coin on which the emperor is shown wearing a radiate or pointed solar crown, especially in the 3rd century AD.radiate broochCATEGORY: artifact
DEFINITION: General term referring to bow-brooches with a semi-circular headplate decorated with a row of radiating knobs. Two major types are the radiate brooch with a straight-sided footplate (found in Frankish territories) and that with a lozenge-shaped footplate (found in Lombardic contexts).
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Big Horn Medicine WheelCATEGORY: artifact
DEFINITION: A medicine wheel in the Big Horn Mountains of Wyoming that consists of a D-shaped stone cairn from which 28 individual stone spokes radiate. The outer circumference has six smaller cairns. The feature may be astronomically aligned.FingleshamCATEGORY: site
DEFINITION: An early Saxon cemetery in Kent, used between the early 6th and mid-7th centuries. The large inhumation cemetery has produced an impressive collection of material including a pattern-welded sword, garnet-inlaid bird brooches made in Kent, radiate brooches from the continent, and a richly decorated square-headed brooch. Wooden boxes with bronze binding, strings of beads, corroded buckets, and bone objects of the period were also found. Some of the female burials seem to have been interred alive.Hertzian cone of forceCATEGORY: lithics
DEFINITION: The cone shape in which the energy of a projectile impact in high silica content stone radiates through the structure of the stone.Nasca linesSYNONYMS OR RELATED TERMS: geoglyphs; Nazca lines
DEFINITION: In the Peruvian desert or Nasca region of the southern coast, geometric and geomorphic patterns created by the removal of surface stones to reveal the pale earth beneath. The lines were made by clearing the surface of small red/brown stones and exposing the lighter-colored soil underneath. The straight lines radiate to points in small hills and suggest a ceremonial function. The straight lines date to the Early Intermediate as well as to later periods. Maria Reiche, a researcher, believes that the figures represent constellations and the straight lines have astronomical significance. Others believe the lines pointed toward sacred places. The Nasca lines are virtually indecipherable from ground level, but are plainly visible from the air. The lines have been preserved by the extreme dryness of the climate of the region.X-ray fluorescenceSYNONYMS OR RELATED TERMS: X-ray fluorescence spectrometry, X-ray fluorimetry; XRF; X-ray fluorescence analysis
DEFINITION: A nondestructive physical method used for chemical analyses of solids and liquids. The specimen is irradiated by an intense X-ray beam and the lines in the spectrum of the resulting X-ray fluorescence are diffracted at various angles by a crystal with known lattice spacing; the elements in the specimen are identified by the wavelengths of their spectral lines, and their concentrations are determined by the intensities of these lines. Constituent elements are identified based on the unique wavelengths of fluorescent X-rays they emit and concentrations are estimated on the intensity of the released X-rays. It can be used on pottery, obsidian, glass, and some metal and under most circumstances is totally non-destructive. In general terms the method is more suitable for the analysis of the major elements in a specimen, though trace elements can be determined in some cases. Since automation of recording and sample changing is possible, large numbers of samples can be analyzed at speed, which gives this method a definite advantage over atomic absorption spectrometry and optical emission spectrometry.radial fissureCATEGORY: lithics
DEFINITION: Tiny fracture lines that sometimes radiate away from the point of percussion around the bulb on the ventral surface of a lithic flake.radial planeCATEGORY: ceramics
DEFINITION: The plane that radiates from the vertical axis of a pot's (radial or bilateral) symmetry or from the longitudinal axis of a tree or branch.ritsuryoCATEGORY: term
DEFINITION: Code of laws adopted in Japan in 702 AD, marking the shift from Yamato to Ritsuryo state administration. The ritsuryo system refers to the governmental structure defined by ritsu, the criminal code, and ryo, the administrative and civil codes. Such a system had long been in force in China, and the Japanese ritsuryo was an imitation of the lü-ling of T'ang China and incorporated many of its original articles. The Ritsuryo state used the T'ang dynasty model of capital city, from which trunk routes radiated. These formed the focus of regional administrative districts, which were further divided into provinces with provincial capitals. In this system, the emperor was an absolute monarch and the people were divided into two classes, freemen and slaves.