anthracite 音标拼音: ['ænθrəs
, ɑɪt]
n . 无烟煤
无烟煤
anthracite n 1 :
a hard natural coal that burns slowly and gives intense heat [
synonym : {
anthracite }, {
anthracite coal }, {
hard coal }]
Anthracite \
An "
thra *
cite \,
n . [
L .
anthracites a kind of bloodstone ;
fr .
Gr . ?
like coals ,
fr . '
a `
nqrax , ?,
coal or charcoal .
Cf . {
Anthrax }.]
A hard ,
compact variety of mineral coal ,
of high luster ,
differing from bituminous coal in containing little or no bitumen ,
in consequence of which it burns with a nearly non luminous flame .
The purer specimens consist almost wholly of carbon .
Also called glance coal and blind coal .
[
1913 Webster ]
Coal \
Coal \ (
k [=
o ]
l ),
n . [
AS .
col ;
akin to D .
kool ,
OHG .
chol ,
cholo ,
G .
kohle ,
Icel .
kol ,
pl .,
Sw .
kol ,
Dan .
kul ;
cf .
Skr .
jval to burn .
Cf . {
Kiln }, {
Collier }.]
1 .
A thoroughly charred ,
and extinguished or still ignited ,
fragment from wood or other combustible substance ;
charcoal .
[
1913 Webster ]
2 . (
Min .)
A black ,
or brownish black ,
solid ,
combustible substance ,
dug from beds or veins in the earth to be used for fuel ,
and consisting ,
like charcoal ,
mainly of carbon ,
but more compact ,
and often affording ,
when heated ,
a large amount of volatile matter .
[
1913 Webster ]
Note :
This word is often used adjectively ,
or as the first part of self -
explaining compounds ;
as ,
coal -
black ;
coal formation ;
coal scuttle ;
coal ship .
etc .
[
1913 Webster ]
Note :
In England the plural coals is used ,
for the broken mineral coal burned in grates ,
etc .;
as ,
to put coals on the fire .
In the United States the singular in a collective sense is the customary usage ;
as ,
a hod of coal .
[
1913 Webster ]
{
Age of coal plants }.
See {
Age of Acrogens },
under {
Acrogen }.
{
Anthracite }
or {
Glance coal }.
See {
Anthracite }.
{
Bituminous coal }.
See under {
Bituminous }.
{
Blind coal }.
See under {
Blind }.
{
Brown coal }
or {
Brown Lignite }.
See {
Lignite }.
{
Caking coal },
a bituminous coal ,
which softens and becomes pasty or semi -
viscid when heated .
On increasing the heat ,
the volatile products are driven off ,
and a coherent ,
grayish black ,
cellular mass of coke is left .
{
Cannel coal },
a very compact bituminous coal ,
of fine texture and dull luster .
See {
Cannel coal }.
{
Coal bed } (
Geol .),
a layer or stratum of mineral coal .
{
Coal breaker },
a structure including machines and machinery adapted for crushing ,
cleansing ,
and assorting coal .
{
Coal field } (
Geol .),
a region in which deposits of coal occur .
Such regions have often a basinlike structure ,
and are hence called {
coal basins }.
See {
Basin }.
{
Coal gas },
a variety of carbureted hydrogen ,
procured from bituminous coal ,
used in lighting streets ,
houses ,
etc .,
and for cooking and heating .
{
Coal heaver },
a man employed in carrying coal ,
and esp .
in putting it in ,
and discharging it from ,
ships .
{
Coal measures }. (
Geol .)
(
a )
Strata of coal with the attendant rocks .
(
b )
A subdivision of the carboniferous formation ,
between the millstone grit below and the Permian formation above ,
and including nearly all the workable coal beds of the world .
{
Coal oil },
a general name for mineral oils ;
petroleum .
{
Coal plant } (
Geol .),
one of the remains or impressions of plants found in the strata of the coal formation .
{
Coal tar }.
See in the Vocabulary .
{
To haul over the coals },
to call to account ;
to scold or censure . [
Colloq .]
{
Wood coal }.
See {
Lignite }.
[
1913 Webster ]
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