Word origin · etymology
Eponym.
Named for astrologer Ronald Davison. The name identifies his relationship-chart approach rather than a classical-language compound.
Mona Riegger: Beyond Midlife, Appendix on astrological techniques ↗
How we know · epistemology
Constructed reference chart
An intermediate time and place allow a real-sky calculation for a constructed reference event. That event is not the couple’s birth, and geographic midpoint choices can change the result.
Connected concepts
Terms used in this explanation
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.