Medical Astrology

MED-ih-kuhl

Definition

Medical astrology, also called iatromathematics, is the historical branch that linked the zodiac signs to regions of the body (melothesia), the planets to organs and to the four humors, and chart timing to when an illness began and how it ran. The pre-modern system joined celestial diagnosis to herbal and pharmacological treatment. Zodisphere presents it as a system worth studying historically; it endorses no modern medical claims.

In Tradition

Across Hellenistic, Arabic-Persian, and Renaissance practice, medical astrology rests on three interlocking doctrines: melothesia, which assigns body parts to signs from Aries at the head down to Pisces at the feet; planetary rulership of the organs and humors; and decumbiture, a chart cast for the onset of an illness or the moment of taking to bed, used for diagnosis and prognosis. Within this framework, Bonatti supplies a procedure for locating the infirmity from each planet's placement in each sign.

In Practice

A traditional astrologer reads, in turn: (1) the natal chart for constitutional temperament — the dominant humor, whether sanguine, choleric, melancholic, or phlegmatic, inferred from the Ascendant sign, the Moon, and the Sun and Moon placements; (2) the afflicted body regions, traced through the troubled signs and the planets ruling them; and (3) decumbiture charts for the course of the illness, with the Moon as the chief significator. Crisis days are timed by the Moon's 7° arcs from its decumbiture position, and herbal allotments follow the planetary rulerships set out in Culpeper's *Complete Herbal* (1652). The framework is offered here as a historical system; no clinical use is implied.

Historical Origin

Iatromathematical doctrine appears in Hellenistic Hermetic fragments and the *Iatromathematika* attributed to Hermes and Asclepius, in Ptolemy's *Tetrabiblos* III.12, and in Galen's *De diebus decretoriis* on critical days. Medieval Arabic and Latin authors — Bonatti, and Lilly in *Christian Astrology* (1647) — systematise horary-medical practice; Culpeper's *Complete Herbal* (1652) fixes the herbal correspondences; and Cornell's *Encyclopedia of Medical Astrology* (1933) supplies the modern reference compilation.

Etymology

Origin: Latin/Greek. Meaning: From Latin medicus (physician) + Greek astron (star) + logos (study).

Further Reading