What is "hypostatical"

Hypostatic \Hy`po*stat"ic\, Hypostatical \Hy`po*stat"ic*al\, a.

1. Relating to hypostasis, or substance; hence, constitutive, or elementary.

   The grand doctrine of the chymists, touching their three hypostatical principles.
   --Boyle.

2. Personal, or distinctly personal; relating to the divine hypostases, or substances.
   --Bp. Pearson.

3. (Med.) Depending upon, or due to, deposition or setting; as, hypostatic cognestion, cognestion due to setting of blood by gravitation.

   Hypostatic union (Theol.), the union of the divine with the human nature of Christ.
   --Tillotson.

a. hypostatic