Almagest

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Al·ma·gest

A0220300 (ăl′mə-jĕst′)n.1. A comprehensive treatise on astronomy, geography, and mathematics compiled by Ptolemy about ad 150.2. almagest Any of several medieval treatises concerned with astronomy or alchemy.
[Middle English almageste, from Old French, from Arabic al-majisti : al-, the + Greek megistē (suntaxis), greatest (composition), feminine of megistos, greatest, superlative of megas, great; see meg- in Indo-European roots.]

Almagest

(ˈælməˌdʒɛst) n1. (Astronomy) a work on astronomy compiled by Ptolemy in the 2nd century ad containing a description of the geocentric system of the universe and a star catalogue2. (Historical Terms) (sometimes not capital) any of various similar medieval treatises on astrology, astronomy, or alchemy[C14: from Old French, from Arabic al-majisti, from al the + majisti, from Greek megistē greatest (treatise)]

Al•ma•gest

(ˈæl məˌdʒɛst)

n. 1. (italics) a Greek work on astronomy and mathematics by Ptolemy. 2. (l.c.) any of various similar treatises by medieval writers. [1350–1400; Middle English almageste < Middle French < Arabic al the + majisṭī < Greek megístē (sýntaxis) greatest (composition)]
Translations
almageste