Midheaven
DefinitionThe Midheaven, often abbreviated MC from the Latin Medium Coeli, is one of the four principal angles of an astrological chart. It...
Micron
DefinitionA micron is an older name for a micrometre, a scientific unit equal to one-millionth of a metre. The symbol μm is...
Metonic Return
DefinitionA Metonic Return marks the completion of the Metonic cycle, a period of approximately 19 solar years, or 235 synodic months. After...
Metonic Cycle
DefinitionThe Metonic Cycle is a period of approximately 19 tropical years, during which 235 synodic lunar months occur. After this interval, the...
Mesmerism
DefinitionMesmerism is a historical theory and practice developed by Franz Anton Mesmer in the eighteenth century. Mesmer proposed that an invisible force...
Meridional
DefinitionMeridional means southern or relating to the meridian, the north–south great circle that passes through the zenith and the celestial poles. The...
