Definition of Mica
Mi´ca
n.
1.
(Min.)
The
name
of
a
group
of
minerals
characterized
by
highly
perfect
cleavage
,
so
that
they
readily
separate
into
very
thin
leaves
,
more
or
less
elastic
.
They
differ
widely
in
composition
,
and
vary
in
color
from
pale
brown
or
yellow
to
green
or
black
.
The
transparent
forms
are
used
in
lanterns
,
the
doors
of
stoves
,
etc
.,
being
popularly
called
isinglass
.
Formerly
called
also
cat-silver
,
and
glimmer
.
Mica diorite
(Min.)
an
eruptive
rock
allied
to
diorite
but
containing
mica
(
biotite
)
instead
of
hornblende
.
Mica powder
a
kind
of
dynamite
containing
fine
scales
of
mica
.
Mica schist
(Geol.)
a
schistose
rock
,
consisting
of
mica
and
quartz
with
,
usually
,
some
feldspar
.
Related Words
biotite
,
isinglass
,
lepidolite
,
mineral
,
muscovite
,
paragonite
,
phlogopite
,
translucent
substance
,
transparent
substance
,
zinnwaldite
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Micaceo-calcareous
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