Answer: almagest

AnswerCrossword Clue
ALMAGESTAstronomical treatise by Ptolemy, c. 150 A. D.
ALMAGESTMedieval work on alchemy, astrology, etc.
ALMAGESTPtolemy classic.
ALMAGESTMedieval treatise
ALMAGESTPtolemy's work on astronomy
ALMAGESTWork on astronomy
ALMAGESTPtolemy treatise on astronomy
ALMAGESTPtolemy's star catalog
almagestany of various medieval works of a like kind, as on astrology or alchemy
almagestGreek work on astronomy by Ptolemy
almagesta medieval treatise on astrology and alchemy