炼丹家

Spagyrist \Spag"y*rist\, n. [Cf. F. spagiriste.]
1. A chemist, esp. one devoted to alchemistic pursuits.
[Obs.]

2. One of a sect which arose in the days of alchemy, who
sought to discover remedies for disease by chemical means.
The spagyrists historically preceded the iatrochemists.
--Encyc. Brit.