Word origin · etymology
Latin phrase.
Imum means lowest part and coeli means of heaven. IC preserves this traditional name for the lower meridian angle.
How we know · epistemology
Spherical geometry with symbolic use
This point is fixed by opposition to the Midheaven. Associations with home and roots belong to astrological interpretation; the computed angle does not establish facts about someone’s family.
Connected concepts
Terms used in this explanation
Mentioned in 1 other entry
These links connect subjects and terminology. They do not establish a shared historical origin.
Sources & provenance
Use the citations beside each section to distinguish a calculation convention, a historical teaching and an editorial example.