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Almagest Syllabification: Al·ma·gest
Pronunciation: /ˈalməˌjest/

Definition of Almagest in English:


(the Almagest)
1An influential treatise on astronomy written by the Greek astronomer and geographer Ptolemy in the second century ad.
Example sentences
  • Finally, the translation of Ptolemy's Almagest furnished important astronomical material.
  • But once they had translated Ptolemy's Almagest, they developed astronomy so quickly that their mark is found at every step.
  • Menelaus's work formed the basis for Ptolemy's numerical solutions of spherical astronomy problems in the Almagest.
1.1 (also almagest) (In the Middle Ages) any celebrated textbook on astrology and alchemy.


Late Middle English: from Old French almageste, based on Arabic, from al 'the' + Greek megistē 'greatest (composition)'.

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