mica : Idioms & Phrases
Mica diorite
(Min.) , an eruptive rock allied to diorite but containing mica (biotite) instead of hornblende.
Webster 1913
Mica powder
- a kind of dynamite containing fine scales of mica.
Webster 1913
Mica schist , Mica slate
(Geol.) , a schistose rock, consisting of mica and quartz with, usually, some feldspar.