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Almagest

/ˈælməˌdʒɛst/proper noun

Ptolemy's second-century treatise on astronomy, the standard authority in Europe and the Islamic world for well over a thousand years.

The Greek roots

μεγίστη
megístē
greatest

Literally: the greatest

Follow a root:μεγίστη1 word

The story of the word

Ptolemy called his book the Mathematical Compilation. Later Greek readers called it the great one, and then simply ἡ μεγίστη, the greatest. Arabic translators kept that superlative and fused their own article to it, al-majisṭī, and medieval Latin took it back as Almagest. The title therefore reached Europe wearing an Arabic definite article on a Greek adjective, and Chaucer's Wife of Bath is already citing it by 1390.

How it travelled
Ancient Greek → Arabic → Medieval Latin → English
First recorded
14th century

Same family

megaphonemegalithomegamegalomania

In a sentence

Every European star catalogue before Tycho leans on the Almagest.

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