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old age
(Encyclopedia)old age: see geriatrics.mental age
(Encyclopedia)mental age: see intelligence.Bronze Age
(Encyclopedia)Bronze Age, period in the development of technology when metals were first used regularly in the manufacture of tools and weapons. Pure copper and bronze, an alloy of copper and tin, were used indiscr...Stone Age
(Encyclopedia)Stone Age: see Paleolithic period; Mesolithic period; Neolithic period. ...age grade and age set
(Encyclopedia)age grade and age set, differentiation of social role based on age, commonly found in small-scale societies of North America and East Africa. Age sets are a type of sodality (nonresidential groups tha...mammoth
(Encyclopedia)mammoth, name for several large prehistoric relatives (genus Mammuthus) of modern elephants which ranged over Eurasia and North America in the Pleistocene epoch. The shoulder height of the Siberian, o...Chi'an
(Encyclopedia)Chi'an: see Ji'an, China.Chang'an
(Encyclopedia)Chang'an: Xi'an.Chao'an
(Encyclopedia)Chao'an, Ch'ao-an, or Chaochow, China: see Chaozhou. ...An Uaimh
(Encyclopedia)An Uaimh, Republic of Ireland: see Navan. ...Browse by Subject
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