The Collaborative International Dictionary
KAl3Si3O10OH2
Muscovite \Mus"co*vite\, n. [See Muscovy glass.]
A native or inhabitant of Muscovy or ancient Russia; hence, a Russian.
An inhabitant of Moscow.
(Min.) Common potash mica, essentially KAl3Si3O10(OH)2. It is used as an electrical insulator. See Mica.