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| Almagest [ álmə jest ] (plural Almagests) |
noun |
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1. astronomy text: a text on astronomy written by Ptolemy in the 2nd century ad setting out his view of the universe with the Earth at its centre surrounded by spheres
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2. medieval treatise on astronomy: an important medieval treatise on a subject, especially on astronomy, astrology, or alchemy
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| [14th century. Via Old French< Arabic al-mijistī 'the greatest' < Greek megistē 'greatest', superlative of megas 'great' (see mega-)] |
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