An Etymological Dictionary of Astronomy and Astrophysics

A comprehensive treatise, compiled by Claudius Ptolemy of Alexandria, around A.D. 140,
that summarized the astronomy, geography, and mathematics of antiquity, and included a star catalogue with data for 1,022 stars.

Etymology (EN): Almagest, from Ar. Al-majisti, from al “the” + Gk. megiste (suntaxis) “the greatest (composition),” from femenine of megistos, superlative of megas “great.”