isinglass
n . 鱼胶,明胶,云母
鱼胶,明胶,云母
isinglass n 1 :
any of various minerals consisting of hydrous silicates of aluminum or potassium etc .
that crystallize in forms that allow perfect cleavage into very thin leaves ;
used as dielectrics because of their resistance to electricity [
synonym : {
mica }, {
isinglass }]
Isinglass \
I "
sin *
glass \,
n . [
Prob .
corrupted fr .
D .
huizenblas (
akin to G .
hausenblase ),
lit .,
bladder of the huso ,
or large sturgeon ;
huizen sturgeon blas bladder .
Cf . {
Bladder },
{
Blast }
a gust of wind .]
[
1913 Webster ]
1 .
A semitransparent ,
whitish ,
and very pure form of gelatin ,
chiefly prepared from the sounds or air bladders of various species of sturgeons (
as the {
Acipenser huso })
found in the rivers of Western Russia .
It used for making jellies ,
as a clarifier ,
etc .
Cheaper forms of gelatin are not unfrequently so called .
Called also {
fish glue }.
[
1913 Webster ]
2 . (
Min .)
A popular name for mica ,
especially when in thin sheets .
[
1913 Webster ]
Mica \
Mi "
ca \,
n . [
L .
mica crumb ,
grain ,
particle ;
cf .
F .
mica .]
(
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 }.
[
1913 Webster ]
Note :
The important species of the mica group are :
{
muscovite },
common or potash mica ,
pale brown or green ,
often silvery ,
including {
damourite } (
also called {
hydromica }
and {
muscovy glass }); {
biotite },
iron -
magnesia mica ,
dark brown ,
green ,
or black ;
{
lepidomelane },
iron ,
mica ,
black ; {
phlogopite },
magnesia mica ,
colorless ,
yellow ,
brown ; {
lepidolite },
lithia mica ,
rose -
red ,
lilac .
[
1913 Webster ]
Mica (
usually muscovite ,
also biotite )
is an essential constituent of granite ,
gneiss ,
and mica slate ; {
biotite }
is common in many eruptive rocks ;
{
phlogopite }
in crystalline limestone and serpentine .
[
1913 Webster ]
{
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 }, {
Mica slate } (
Geol .),
a schistose rock ,
consisting of mica and quartz with ,
usually ,
some feldspar .
[
1913 Webster ]
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