muscovite, n. & adj.
--n.
1 a native or citizen of Moscow.
2 archaic a Russian.
--adj.
1 of or relating to Moscow.
2 archaic of or relating to Russia.
mod.L Muscovita f. Muscovia = MUSCOVY
muscovite, n. a silver-grey form of mica with a sheetlike crystalline structure that is used in the manufacture of electrical equipment etc.
obs. MUSCOVY glass (in the same sense) + -ITE(1)