- Magic
- Magnetism
- Magnitude
- Major Planets
- Malefic. (n.)
- Mansions of the Moon
- Map
- Marduk, or Asaru
- Mark, Noon or Midnight
- Martian
- Masculine Degrees
- Masculine planets
- Masculine Signs
- Maternal Signs
- Matutine, Matutinal
- Maya
- MC
- Mean Motion
- Mean Time
- Measure of Time
- Medical Astrology
- Medium Coeli
- Mediumship
- Medusa's Head
- Meridian
- Meridian Distance
- Meridional
- Mesmerism
- Metonic Cycle
- Metonic Return
- Micron
- Midheaven
- Midpoint
- Milky Way
- Minute
- Moderators
- Modus Rationalis
- Moisture
- Monad
- Month
- Motion
- Movable Signs.
- Mundane Aspects
- Mundane Astrology
- Mundane Directions, or Directions in Mundo
- Mundane Parallel, or Parallel in Mundo
- Music of the Spheres
- Mutable Signs
- Mute Signs
- Mutilated Degrees
- Mutual Application
- Mutual Aspects
- Mutual Reception
ASTROLABE ENCYCLOPEDIA
