A : M

Malefic/Malevolent - Any planet that has a negative or malevolent influence whether that be by nature or accident. Saturn and Mars are naturally malefic but Jupiter, Venus, Mercury, Sol, & Luna can be malefic by accident and their placement throughout the chart.

Mansions of the Moon - Please refer to Lunar Mansions.

Masculine signs - Signs that are made up of more active elements are therefore more masculine. These signs include Aries, Gemini, Leo, Libra, Sagittarius, & Aquarius.

Mean motion - The average motion of any Planet that it moves.

Medium Coeli - The Latin term for the Midheaven or 10th house. It is the highest southernmost point.

Moiety - The middle division between two orbs.

Moveable signs - Also called the Cardinal signs.

Mundane Astrology - The determining of events of a country or city by casting a chart for its Revolution.

Mutable signs - Also called Common signs.

Mutual Reception - When two Planets receive each other through their Domicile or Exaltation (and sometimes Triplicity). This is a benevolent dignity.