ab-scis-sion
/æbˈsɪʒ.ən/
In Medieval astrology, abscission refers to the interruption or cutting off of an expected outcome through harmful planetary influence.
This condition is most often associated with malefic planets interfering with the perfection of an aspect or the completion of a matter. Abscission can weaken, delay, or entirely prevent the promised result shown in the chart. In horary and predictive practice, astrologers examine whether a significator is damaged by aspect, combustion, or other forms of affliction that interrupt its action. The concept reflects the importance of planetary condition in determining whether events can fully develop.