magistery
/ˈmadʒɪst(ə)ri/noun
1 Alchemy. A master principle of nature, free of impurities; a potent transmuting or curative quality or agency; ( concrete ) a substance, such as the philosopher's stone, capable of transmuting or changing the nature of other substances. Also figurative. Now chiefly historical.
2 Chemistry. The residuum obtained by precipitation from an acid solution; a precipitate; a resinous extract. Now historical.
- magistery of bismuth noun basic bismuth nitrate oxide, BiONO3·H2O, obtained by the addition of water to a solution of bismuth in nitric acid and used as a paint and cosmetic under the name of pearl white or pearl powder..
Origin
Late 15th century (in an earlier sense). From classical Latin magisterium the office of a master, in post-classical Latin also denoting the philosopher's stone from magister + -ium.