Almagest /alˈmə-jest/

1. A great treatise by the Alexandrian astronomer Ptolemy (c.150AD)
2. Extended to other great medieval works on astronomy, etc

• acentric
• -aceous
• acephalous
• acer
• ACER
• Aceraceae
• aceraceous
• acerate
• acerb
• acerbate
• acerbated
• acerbates
• acerbating
• acerber
• acerbest
• acerbic
• acerbically
• acerbities
• acerbity
• acerose
• acerous
• acers
• a certain person
• acervate
• acervately