Musˈcovite noun

A citizen of Moscow or, generally, a Russian

1. Of Muscovy (historical)
2. Russian (archaic)

musˈcovite noun (mineralogy)

1. Common white mica, first obtained in Russia, a silicate of aluminium and potassium
2. The mica in the form of thin transparent plates, formerly used as a kind of glass (also Muscovy glass)

Muscovitic /-vitˈik/ adjective

muscovy duck see musk duck under musk