hydromica schist
Webster's Dictionary (GCIDE)
Hydromica \Hy`dro*mi"ca\, n. [Hydro-, 1 + mica.] (Min.) A variety of potash mica containing water. It is less elastic than ordinary muscovite. [1913 Webster]
Hydromica schist (Min.), a mica schist characterized by the presence of hydromica. It often has a silky luster and almost soapy feel. [1913 Webster]
Word of the day · Sep 28About this word
onerousadjective
What does it mean? Question 1 of today’s quiz