Materia medica

Later on, in the Middle Ages, medical knowledge advanced to such an extent that textbooks on materia medica and germane subjects often treated this area of erotica.

CHIAN earth, in pharmacy, one of the medicinal earths of the ancients, the name of which is preſerved in the catalogues of the materia medica but of which nothing more than the name has been known for many ages in the ſhops...