- Ides
- Illumination, Period of
- Immersion
- Impeded; Impedited
- Imperfect Signs, Broken Signs
- Imum Coeli
- Inclination
- Inconjunct
- Increasing in Light
- Increasing in Motion
- Individual Houses
- Inferior Planets
- Infortunes
- Ingress
- Initiating Signs
- Initiative Type
- Injunct
- Inspirational Natures
- Intellectual Natures
- Intercepted
- Interlunar
- International Astronomical Union (IAU)
- Interpolation
- Interpretation
- Invariable Plane
- Inversion
- Ishtar
- Isis and Osiris
- Issat
ASTROLABE ENCYCLOPEDIA
