Definition of "magisterium"

magisterium

noun
plural magisteriums or magisteria
1. The teaching authority or office of the Roman Catholic Church.
2. An authoritative statement.
3. (alchemy) The philosopher's stone.
  Quotations
  This is the day I am to perfect for him / The magisterium, our great work, the stone.
  1610 (first performance), Ben[jamin] Jonson, The Alchemist, London: […] Thomas Snodham, for Walter Burre, and are to be sold by Iohn Stepneth, […], published 1612; reprinted Menston, Yorkshire: The Scolar Press, 1970, (please specify the GB page), (please specify the scene number in lowercase Roman numerals)